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Andrew Clegg commented on SPARK-22371: -------------------------------------- Another data point -- I've seen this happen (in 2.3.0) during cleanup after a task failure: {{Caused by: org.apache.spark.SparkException: Job aborted due to stage failure: Exception while getting task result: java.lang.IllegalStateException: Attempted to access garbage collected accumulator 365}} {{ at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1599)}} {{ at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1587)}} {{ at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1586)}} {{ at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)}} {{ at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)}} {{ at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1586)}} {{ at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:831)}} {{ at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:831)}} {{ at scala.Option.foreach(Option.scala:257)}} {{ at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:831)}} {{ at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1820)}} {{ at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1769)}} {{ at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1758)}} {{ at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)}} {{ at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:642)}} {{ at org.apache.spark.SparkContext.runJob(SparkContext.scala:2027)}} {{ at org.apache.spark.sql.execution.datasources.FileFormatWriter$.write(FileFormatWriter.scala:194)}} {{ ... 31 more}} > dag-scheduler-event-loop thread stopped with error Attempted to access > garbage collected accumulator 5605982 > ------------------------------------------------------------------------------------------------------------- > > Key: SPARK-22371 > URL: https://issues.apache.org/jira/browse/SPARK-22371 > Project: Spark > Issue Type: Bug > Components: Spark Core > Affects Versions: 2.1.0 > Reporter: Mayank Agarwal > Priority: Major > Attachments: Helper.scala, ShuffleIssue.java, > driver-thread-dump-spark2.1.txt, sampledata > > > Our Spark Jobs are getting stuck on DagScheduler.runJob as dagscheduler > thread is stopped because of *Attempted to access garbage collected > accumulator 5605982*. > from our investigation it look like accumulator is cleaned by GC first and > same accumulator is used for merging the results from executor on task > completion event. > As the error java.lang.IllegalAccessError is LinkageError which is treated as > FatalError so dag-scheduler loop is finished with below exception. > ---ERROR stack trace -- > Exception in thread "dag-scheduler-event-loop" java.lang.IllegalAccessError: > Attempted to access garbage collected accumulator 5605982 > at > org.apache.spark.util.AccumulatorContext$$anonfun$get$1.apply(AccumulatorV2.scala:253) > at > org.apache.spark.util.AccumulatorContext$$anonfun$get$1.apply(AccumulatorV2.scala:249) > at scala.Option.map(Option.scala:146) > at > org.apache.spark.util.AccumulatorContext$.get(AccumulatorV2.scala:249) > at > org.apache.spark.scheduler.DAGScheduler$$anonfun$updateAccumulators$1.apply(DAGScheduler.scala:1083) > at > org.apache.spark.scheduler.DAGScheduler$$anonfun$updateAccumulators$1.apply(DAGScheduler.scala:1080) > at > scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) > at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48) > at > org.apache.spark.scheduler.DAGScheduler.updateAccumulators(DAGScheduler.scala:1080) > at > org.apache.spark.scheduler.DAGScheduler.handleTaskCompletion(DAGScheduler.scala:1183) > at > org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1647) > at > org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1605) > at > org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1594) > at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48) > I am attaching the thread dump of driver as well -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org