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https://issues.apache.org/jira/browse/SPARK-23433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16387759#comment-16387759
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Imran Rashid commented on SPARK-23433:
--------------------------------------

sorry it has taken me some time to get to this -- its a little more complex 
than I thought as currently tasksetmanagers for the same stage do not send any 
updates to each other, so I am trying to make sure I understand it well.  
anyone else is welcome to take it up in the meantime.

[~guoxiaolongzte] -- are you sure you see the same issue, with the same 
sequence of events as described by Shixiong Zhu?  I want to make sure its not 
another instance of the same exception, but perhaps with a different underlying 
cause.

> java.lang.IllegalStateException: more than one active taskSet for stage
> -----------------------------------------------------------------------
>
>                 Key: SPARK-23433
>                 URL: https://issues.apache.org/jira/browse/SPARK-23433
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.2.1
>            Reporter: Shixiong Zhu
>            Priority: Major
>
> This following error thrown by DAGScheduler stopped the cluster:
> {code}
> 18/02/11 13:22:27 ERROR DAGSchedulerEventProcessLoop: 
> DAGSchedulerEventProcessLoop failed; shutting down SparkContext
> java.lang.IllegalStateException: more than one active taskSet for stage 
> 7580621: 7580621.2,7580621.1
>       at 
> org.apache.spark.scheduler.TaskSchedulerImpl.submitTasks(TaskSchedulerImpl.scala:229)
>       at 
> org.apache.spark.scheduler.DAGScheduler.submitMissingTasks(DAGScheduler.scala:1193)
>       at 
> org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$submitStage(DAGScheduler.scala:1059)
>       at 
> org.apache.spark.scheduler.DAGScheduler$$anonfun$submitWaitingChildStages$6.apply(DAGScheduler.scala:900)
>       at 
> org.apache.spark.scheduler.DAGScheduler$$anonfun$submitWaitingChildStages$6.apply(DAGScheduler.scala:899)
>       at 
> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
>       at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
>       at 
> org.apache.spark.scheduler.DAGScheduler.submitWaitingChildStages(DAGScheduler.scala:899)
>       at 
> org.apache.spark.scheduler.DAGScheduler.handleTaskCompletion(DAGScheduler.scala:1427)
>       at 
> org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1929)
>       at 
> org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1880)
>       at 
> org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1868)
>       at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
> {code}



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