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[SPARK-22651][PYTHON][ML] Prevent initiating multiple Hive clients for ImageSchema.readImages #19845

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[SPARK-22651][PYTHON][ML] Prevent initiating multiple Hive clients for ImageSchema.readImages #19845

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c0c3c48
Prevent initiating multiple Hive clients for ImageSchema.readImages
HyukjinKwon Nov 29, 2017
2e4c402
Add a test case
HyukjinKwon Nov 30, 2017
0c7e537
Address comments
HyukjinKwon Dec 1, 2017
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25 changes: 24 additions & 1 deletion python/pyspark/ml/tests.py
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Original file line number Diff line number Diff line change
Expand Up @@ -67,7 +67,7 @@
from pyspark.ml.util import *
from pyspark.ml.wrapper import JavaParams, JavaWrapper
from pyspark.serializers import PickleSerializer
from pyspark.sql import DataFrame, Row, SparkSession
from pyspark.sql import DataFrame, Row, SparkSession, HiveContext
from pyspark.sql.functions import rand
from pyspark.sql.types import DoubleType, IntegerType
from pyspark.storagelevel import *
Expand Down Expand Up @@ -1837,6 +1837,29 @@ def test_read_images(self):
self.assertEqual(ImageSchema.undefinedImageType, "Undefined")


class ImageReaderTest2(PySparkTestCase):

@classmethod
def setUpClass(cls):
PySparkTestCase.setUpClass()
try:
cls.sc._jvm.org.apache.hadoop.hive.conf.HiveConf()
except py4j.protocol.Py4JError:
cls.tearDownClass()
raise unittest.SkipTest("Hive is not available")
except TypeError:
cls.tearDownClass()
raise unittest.SkipTest("Hive is not available")
cls.spark = HiveContext._createForTesting(cls.sc)

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@viirya viirya Dec 1, 2017

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Add classmethod tearDownClass to stop the cls.spark? I didn't see HiveContextSQLTests closes it anyway, maybe we can fix it too.

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@HyukjinKwon HyukjinKwon Dec 1, 2017 •
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Sure, that should be safer but let me fix it this one here only for now. Let's fix that up too when we touch some codes around there.

def test_read_images_multiple_times(self):
# This test case is to check if `ImageSchema.readImages` tries to
# initiate Hive client multiple times. See SPARK-22651.
data_path = 'data/mllib/images/kittens'
ImageSchema.readImages(data_path, recursive=True, dropImageFailures=True)
ImageSchema.readImages(data_path, recursive=True, dropImageFailures=True)


class ALSTest(SparkSessionTestCase):

def test_storage_levels(self):
Expand Down