Uncaught exception in thread heartbeat-receiver-event-loop-thread

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Uncaught exception in thread heartbeat-receiver-event-loop-thread

Shiyuan
Hi, 
    I got an error of Uncaught exception in thread heartbeat-receiver-event-loop-thread.  Does this error indicate that some node is  too overloaded to be responsive?  Thanks!

ERROR Utils: Uncaught exception in thread heartbeat-receiver-event-loop-thread
java.lang.NullPointerException
        at org.apache.spark.util.CollectionAccumulator.value(AccumulatorV2.scala:464)
        at org.apache.spark.util.CollectionAccumulator.value(AccumulatorV2.scala:439)
        at org.apache.spark.scheduler.TaskSchedulerImpl$$anonfun$6$$anonfun$7.apply(TaskSchedulerImpl.scala:408)
        at org.apache.spark.scheduler.TaskSchedulerImpl$$anonfun$6$$anonfun$7.apply(TaskSchedulerImpl.scala:408)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
        at scala.collection.Iterator$class.foreach(Iterator.scala:893)
        at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
        at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
        at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
        at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
        at scala.collection.AbstractTraversable.map(Traversable.scala:104)
        at org.apache.spark.scheduler.TaskSchedulerImpl$$anonfun$6.apply(TaskSchedulerImpl.scala:408)
        at org.apache.spark.scheduler.TaskSchedulerImpl$$anonfun$6.apply(TaskSchedulerImpl.scala:407)
        at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
        at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
        at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
        at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
        at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:241)
        at scala.collection.mutable.ArrayOps$ofRef.flatMap(ArrayOps.scala:186)
        at org.apache.spark.scheduler.TaskSchedulerImpl.executorHeartbeatReceived(TaskSchedulerImpl.scala:407)
        at org.apache.spark.HeartbeatReceiver$$anonfun$receiveAndReply$1$$anon$2$$anonfun$run$2.apply$mcV$sp(HeartbeatReceiver.scala:129)
        at org.apache.spark.util.Utils$.tryLogNonFatalError(Utils.scala:1295)
        at org.apache.spark.HeartbeatReceiver$$anonfun$receiveAndReply$1$$anon$2.run(HeartbeatReceiver.scala:128)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

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Re: Uncaught exception in thread heartbeat-receiver-event-loop-thread

ccherng
I have also encountered the NullPointerException in CollectionAccumulator. It
looks like there was an issue filed for this
https://issues.apache.org/jira/browse/SPARK-20977.



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Re: Uncaught exception in thread heartbeat-receiver-event-loop-thread

ccherng
And reading through the comments in that issue
https://issues.apache.org/jira/browse/SPARK-20977 it looks like it was just
ignored but marked resolved.



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