Merge branch 'master' into SPARK-10117

Author: Lewuathe

core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleExternalSorter.java

@@ -122,6 +122,10 @@ public UnsafeShuffleExternalSorter(
     this.maxRecordSizeBytes = pageSizeBytes - 4;
     this.writeMetrics = writeMetrics;
     initializeForWriting();
+
+    // preserve first page to ensure that we have at least one page to work with. Otherwise,
+    // other operators in the same task may starve this sorter (SPARK-9709).
+    acquireNewPageIfNecessary(pageSizeBytes);
   }
 
   /**

core/src/main/scala/org/apache/spark/SparkContext.scala

@@ -1516,8 +1516,12 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
    */
   @DeveloperApi
   def getRDDStorageInfo: Array[RDDInfo] = {
+    getRDDStorageInfo(_ => true)
+  }
+
+  private[spark] def getRDDStorageInfo(filter: RDD[_] => Boolean): Array[RDDInfo] = {
     assertNotStopped()
-    val rddInfos = persistentRdds.values.map(RDDInfo.fromRdd).toArray
+    val rddInfos = persistentRdds.values.filter(filter).map(RDDInfo.fromRdd).toArray
     StorageUtils.updateRddInfo(rddInfos, getExecutorStorageStatus)
     rddInfos.filter(_.isCached)
   }

core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala

@@ -18,6 +18,7 @@
 package org.apache.spark.deploy.history
 
 import java.io.{BufferedInputStream, FileNotFoundException, InputStream, IOException, OutputStream}
+import java.util.UUID
 import java.util.concurrent.{ExecutorService, Executors, TimeUnit}
 import java.util.zip.{ZipEntry, ZipOutputStream}
 
@@ -73,7 +74,7 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
   // The modification time of the newest log detected during the last scan. This is used
   // to ignore logs that are older during subsequent scans, to avoid processing data that
   // is already known.
-  private var lastModifiedTime = -1L
+  private var lastScanTime = -1L
 
   // Mapping of application IDs to their metadata, in descending end time order. Apps are inserted
   // into the map in order, so the LinkedHashMap maintains the correct ordering.
@@ -179,15 +180,14 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
    */
   private[history] def checkForLogs(): Unit = {
     try {
+      val newLastScanTime = getNewLastScanTime()
       val statusList = Option(fs.listStatus(new Path(logDir))).map(_.toSeq)
         .getOrElse(Seq[FileStatus]())
-      var newLastModifiedTime = lastModifiedTime
       val logInfos: Seq[FileStatus] = statusList
         .filter { entry =>
           try {
             getModificationTime(entry).map { time =>
-              newLastModifiedTime = math.max(newLastModifiedTime, time)
-              time >= lastModifiedTime
+              time >= lastScanTime
             }.getOrElse(false)
           } catch {
             case e: AccessControlException =>
@@ -224,12 +224,29 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
           }
         }
 
-      lastModifiedTime = newLastModifiedTime
+      lastScanTime = newLastScanTime
     } catch {
       case e: Exception => logError("Exception in checking for event log updates", e)
     }
   }
 
+  private def getNewLastScanTime(): Long = {
+    val fileName = "." + UUID.randomUUID().toString
+    val path = new Path(logDir, fileName)
+    val fos = fs.create(path)
+
+    try {
+      fos.close()
+      fs.getFileStatus(path).getModificationTime
+    } catch {
+      case e: Exception =>
+        logError("Exception encountered when attempting to update last scan time", e)
+        lastScanTime
+    } finally {
+      fs.delete(path)
+    }
+  }
+
   override def writeEventLogs(
       appId: String,
       attemptId: Option[String],

core/src/main/scala/org/apache/spark/network/netty/NettyBlockRpcServer.scala

@@ -38,6 +38,7 @@ import org.apache.spark.storage.{BlockId, StorageLevel}
  * is equivalent to one Spark-level shuffle block.
  */
 class NettyBlockRpcServer(
+    appId: String,
     serializer: Serializer,
     blockManager: BlockDataManager)
   extends RpcHandler with Logging {
@@ -55,7 +56,7 @@ class NettyBlockRpcServer(
       case openBlocks: OpenBlocks =>
         val blocks: Seq[ManagedBuffer] =
           openBlocks.blockIds.map(BlockId.apply).map(blockManager.getBlockData)
-        val streamId = streamManager.registerStream(blocks.iterator.asJava)
+        val streamId = streamManager.registerStream(appId, blocks.iterator.asJava)
         logTrace(s"Registered streamId $streamId with ${blocks.size} buffers")
         responseContext.onSuccess(new StreamHandle(streamId, blocks.size).toByteArray)
 

core/src/main/scala/org/apache/spark/network/netty/NettyBlockTransferService.scala

@@ -49,7 +49,7 @@ class NettyBlockTransferService(conf: SparkConf, securityManager: SecurityManage
   private[this] var appId: String = _
 
   override def init(blockDataManager: BlockDataManager): Unit = {
-    val rpcHandler = new NettyBlockRpcServer(serializer, blockDataManager)
+    val rpcHandler = new NettyBlockRpcServer(conf.getAppId, serializer, blockDataManager)
     var serverBootstrap: Option[TransportServerBootstrap] = None
     var clientBootstrap: Option[TransportClientBootstrap] = None
     if (authEnabled) {

core/src/main/scala/org/apache/spark/rdd/MapPartitionsWithPreparationRDD.scala

@@ -41,7 +41,7 @@ private[spark] class MapPartitionsWithPreparationRDD[U: ClassTag, T: ClassTag, M
 
   // In certain join operations, prepare can be called on the same partition multiple times.
   // In this case, we need to ensure that each call to compute gets a separate prepare argument.
-  private[this] var preparedArguments: ArrayBuffer[M] = new ArrayBuffer[M]
+  private[this] val preparedArguments: ArrayBuffer[M] = new ArrayBuffer[M]
 
   /**
    * Prepare a partition for a single call to compute.

core/src/main/scala/org/apache/spark/rdd/RDD.scala

@@ -1666,7 +1666,7 @@ abstract class RDD[T: ClassTag](
       import Utils.bytesToString
 
       val persistence = if (storageLevel != StorageLevel.NONE) storageLevel.description else ""
-      val storageInfo = rdd.context.getRDDStorageInfo.filter(_.id == rdd.id).map(info =>
+      val storageInfo = rdd.context.getRDDStorageInfo(_.id == rdd.id).map(info =>
         "    CachedPartitions: %d; MemorySize: %s; ExternalBlockStoreSize: %s; DiskSize: %s".format(
           info.numCachedPartitions, bytesToString(info.memSize),
           bytesToString(info.externalBlockStoreSize), bytesToString(info.diskSize)))

core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala

@@ -1101,7 +1101,6 @@ class DAGScheduler(
             s" ${task.stageAttemptId} and there is a more recent attempt for that stage " +
             s"(attempt ID ${failedStage.latestInfo.attemptId}) running")
         } else {
-
           // It is likely that we receive multiple FetchFailed for a single stage (because we have
           // multiple tasks running concurrently on different executors). In that case, it is
           // possible the fetch failure has already been handled by the scheduler.
@@ -1117,6 +1116,11 @@ class DAGScheduler(
           if (disallowStageRetryForTest) {
             abortStage(failedStage, "Fetch failure will not retry stage due to testing config",
               None)
+          } else if (failedStage.failedOnFetchAndShouldAbort(task.stageAttemptId)) {
+            abortStage(failedStage, s"$failedStage (${failedStage.name}) " +
+              s"has failed the maximum allowable number of " +
+              s"times: ${Stage.MAX_CONSECUTIVE_FETCH_FAILURES}. " +
+              s"Most recent failure reason: ${failureMessage}", None)
           } else if (failedStages.isEmpty) {
             // Don't schedule an event to resubmit failed stages if failed isn't empty, because
             // in that case the event will already have been scheduled.
@@ -1240,10 +1244,17 @@ class DAGScheduler(
     if (errorMessage.isEmpty) {
       logInfo("%s (%s) finished in %s s".format(stage, stage.name, serviceTime))
       stage.latestInfo.completionTime = Some(clock.getTimeMillis())
+
+      // Clear failure count for this stage, now that it's succeeded.
+      // We only limit consecutive failures of stage attempts,so that if a stage is
+      // re-used many times in a long-running job, unrelated failures don't eventually cause the
+      // stage to be aborted.
+      stage.clearFailures()
     } else {
       stage.latestInfo.stageFailed(errorMessage.get)
       logInfo("%s (%s) failed in %s s".format(stage, stage.name, serviceTime))
     }
+
     outputCommitCoordinator.stageEnd(stage.id)
     listenerBus.post(SparkListenerStageCompleted(stage.latestInfo))
     runningStages -= stage

core/src/main/scala/org/apache/spark/scheduler/Stage.scala

@@ -46,7 +46,7 @@ import org.apache.spark.util.CallSite
  * be updated for each attempt.
  *
  */
-private[spark] abstract class Stage(
+private[scheduler] abstract class Stage(
     val id: Int,
     val rdd: RDD[_],
     val numTasks: Int,
@@ -92,6 +92,29 @@ private[spark] abstract class Stage(
    */
   private var _latestInfo: StageInfo = StageInfo.fromStage(this, nextAttemptId)
 
+  /**
+   * Set of stage attempt IDs that have failed with a FetchFailure. We keep track of these
+   * failures in order to avoid endless retries if a stage keeps failing with a FetchFailure.
+   * We keep track of each attempt ID that has failed to avoid recording duplicate failures if
+   * multiple tasks from the same stage attempt fail (SPARK-5945).
+   */
+  private val fetchFailedAttemptIds = new HashSet[Int]
+
+  private[scheduler] def clearFailures() : Unit = {
+    fetchFailedAttemptIds.clear()
+  }
+
+  /**
+   * Check whether we should abort the failedStage due to multiple consecutive fetch failures.
+   *
+   * This method updates the running set of failed stage attempts and returns
+   * true if the number of failures exceeds the allowable number of failures.
+   */
+  private[scheduler] def failedOnFetchAndShouldAbort(stageAttemptId: Int): Boolean = {
+    fetchFailedAttemptIds.add(stageAttemptId)
+    fetchFailedAttemptIds.size >= Stage.MAX_CONSECUTIVE_FETCH_FAILURES
+  }
+
   /** Creates a new attempt for this stage by creating a new StageInfo with a new attempt ID. */
   def makeNewStageAttempt(
       numPartitionsToCompute: Int,
@@ -110,3 +133,8 @@ private[spark] abstract class Stage(
     case _ => false
   }
 }
+
+private[scheduler] object Stage {
+  // The number of consecutive failures allowed before a stage is aborted
+  val MAX_CONSECUTIVE_FETCH_FAILURES = 4
+}

core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala

@@ -260,10 +260,7 @@ final class ShuffleBlockFetcherIterator(
     fetchRequests ++= Utils.randomize(remoteRequests)
 
     // Send out initial requests for blocks, up to our maxBytesInFlight
-    while (fetchRequests.nonEmpty &&
-      (bytesInFlight == 0 || bytesInFlight + fetchRequests.front.size <= maxBytesInFlight)) {
-      sendRequest(fetchRequests.dequeue())
-    }
+    fetchUpToMaxBytes()
 
     val numFetches = remoteRequests.size - fetchRequests.size
     logInfo("Started " + numFetches + " remote fetches in" + Utils.getUsedTimeMs(startTime))
@@ -296,10 +293,7 @@ final class ShuffleBlockFetcherIterator(
       case _ =>
     }
     // Send fetch requests up to maxBytesInFlight
-    while (fetchRequests.nonEmpty &&
-      (bytesInFlight == 0 || bytesInFlight + fetchRequests.front.size <= maxBytesInFlight)) {
-      sendRequest(fetchRequests.dequeue())
-    }
+    fetchUpToMaxBytes()
 
     result match {
       case FailureFetchResult(blockId, address, e) =>
@@ -315,6 +309,14 @@ final class ShuffleBlockFetcherIterator(
     }
   }
 
+  private def fetchUpToMaxBytes(): Unit = {
+    // Send fetch requests up to maxBytesInFlight
+    while (fetchRequests.nonEmpty &&
+      (bytesInFlight == 0 || bytesInFlight + fetchRequests.front.size <= maxBytesInFlight)) {
+      sendRequest(fetchRequests.dequeue())
+    }
+  }
+
   private def throwFetchFailedException(blockId: BlockId, address: BlockManagerId, e: Throwable) = {
     blockId match {
       case ShuffleBlockId(shufId, mapId, reduceId) =>