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From "Rajesh Balamohan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TEZ-3767) Shuffle should not report error to AM during inputContext.killSelf()
Date Wed, 21 Jun 2017 04:20:02 GMT
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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