From 7c8f4756c34a0b00931c2987c827a18d989e6c08 Mon Sep 17 00:00:00 2001 From: zhoukang Date: Thu, 20 Dec 2018 08:26:25 -0600 Subject: [PATCH] [SPARK-24687][CORE] Avoid job hanging when generate task binary causes fatal error ## What changes were proposed in this pull request? When NoClassDefFoundError thrown,it will cause job hang. `Exception in thread "dag-scheduler-event-loop" java.lang.NoClassDefFoundError: Lcom/xxx/data/recommend/aggregator/queue/QueueName; at java.lang.Class.getDeclaredFields0(Native Method) at java.lang.Class.privateGetDeclaredFields(Class.java:2436) at java.lang.Class.getDeclaredField(Class.java:1946) at java.io.ObjectStreamClass.getDeclaredSUID(ObjectStreamClass.java:1659) at java.io.ObjectStreamClass.access$700(ObjectStreamClass.java:72) at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:480) at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:468) at java.security.AccessController.doPrivileged(Native Method) at java.io.ObjectStreamClass.(ObjectStreamClass.java:468) at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:365) at java.io.ObjectOutputStream.writeClass(ObjectOutputStream.java:1212) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1119) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177) at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1377) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1173) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177) at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1377)` It is caused by NoClassDefFoundError will not catch up during task seriazation. `var taskBinary: Broadcast[Array[Byte]] = null try { // For ShuffleMapTask, serialize and broadcast (rdd, shuffleDep). // For ResultTask, serialize and broadcast (rdd, func). val taskBinaryBytes: Array[Byte] = stage match { case stage: ShuffleMapStage => JavaUtils.bufferToArray( closureSerializer.serialize((stage.rdd, stage.shuffleDep): AnyRef)) case stage: ResultStage => JavaUtils.bufferToArray(closureSerializer.serialize((stage.rdd, stage.func): AnyRef)) } taskBinary = sc.broadcast(taskBinaryBytes) } catch { // In the case of a failure during serialization, abort the stage. case e: NotSerializableException => abortStage(stage, "Task not serializable: " + e.toString, Some(e)) runningStages -= stage // Abort execution return case NonFatal(e) => abortStage(stage, s"Task serialization failed: $e\n${Utils.exceptionString(e)}", Some(e)) runningStages -= stage return }` image below shows that stage 33 blocked and never be scheduled. 2018-06-28 4 28 42 2018-06-28 4 28 49 ## How was this patch tested? UT Closes #21664 from caneGuy/zhoukang/fix-noclassdeferror. Authored-by: zhoukang Signed-off-by: Sean Owen --- .../main/scala/org/apache/spark/scheduler/DAGScheduler.scala | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala index 06966e77db81e..6f4c326442e1e 100644 --- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala +++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala @@ -1170,9 +1170,11 @@ private[spark] class DAGScheduler( // Abort execution return - case NonFatal(e) => + case e: Throwable => abortStage(stage, s"Task serialization failed: $e\n${Utils.exceptionString(e)}", Some(e)) runningStages -= stage + + // Abort execution return }