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Posted to issues@tez.apache.org by "Rajesh Balamohan (JIRA)" <ji...@apache.org> on 2017/06/21 04:20:02 UTC
[jira] [Created] (TEZ-3767) Shuffle should not report error to AM
during inputContext.killSelf()
Rajesh Balamohan created TEZ-3767:
-------------------------------------
Summary: 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
{{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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