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https://issues.apache.org/jira/browse/TEZ-3767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rajesh Balamohan reassigned TEZ-3767:
-------------------------------------
Assignee: Rajesh Balamohan
> Shuffle should not report error to AM during inputContext.killSelf()
> --------------------------------------------------------------------
>
> Key: TEZ-3767
> URL: https://issues.apache.org/jira/browse/TEZ-3767
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Attachments: TEZ-3767.1.patch
>
>
> {{ShuffleScheduler::killSelf}} kills the current attempt when it encounters
> certain errors. As a part of cleanup, it invokes {{close}} which internally
> releases the resources.
> If merge is happening in the middle, it could throw the following exception.
> This is caught in {{RunShuffleCallable}} and reported to AM immediately. This
> causes tasks to fail.
> {noformat}
> » Error: Error while running task ( failure ) :
> org.apache.tez.runtime.library.common.shuffle.orderedgrouped.Shuffle$ShuffleError:
> Error while doing final merge
> at
> org.apache.tez.runtime.library.common.shuffle.orderedgrouped.Shuffle$RunShuffleCallable.callInternal(Shuffle.java:320)
> at
> org.apache.tez.runtime.library.common.shuffle.orderedgrouped.Shuffle$RunShuffleCallable.callInternal(Shuffle.java:285)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.util.ConcurrentModificationException
> at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1211)
> at java.util.TreeMap$KeyIterator.next(TreeMap.java:1265)
> at java.util.AbstractCollection.toArray(AbstractCollection.java:141)
> at java.util.ArrayList.addAll(ArrayList.java:577)
> at
> org.apache.tez.runtime.library.common.shuffle.orderedgrouped.MergeManager.close(MergeManager.java:636)
> at
> org.apache.tez.runtime.library.common.shuffle.orderedgrouped.Shuffle$RunShuffleCallable.callInternal(Shuffle.java:316)
> ... 6 more
> {noformat}
> When {{isShutDown}} is set to true, it would be good to avoid sending error
> messages to AM.
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