[jira] [Created] (MAPREDUCE-4330) TaskAttemptCompletedEventTransition invalidates previously successful attempt without checking if the newly completed attempt is successful

["Bikas Saha (JIRA)" <ji...@apache.org>]

Bikas Saha created MAPREDUCE-4330:
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             Summary: TaskAttemptCompletedEventTransition invalidates previously successful attempt without checking if the newly completed attempt is successful
                 Key: MAPREDUCE-4330
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4330
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Bikas Saha
            Assignee: Bikas Saha


The previously completed attempt is removed from successAttemptCompletionEventNoMap and marked OBSOLETE.
After that, if the newly completed attempt is successful then it is added to the successAttemptCompletionEventNoMap. 

This seems wrong because the newly completed attempt could be failed and thus there is no need to invalidate the successful attempt.
One error case would be when a speculative attempt completes with killed/failed after the successful version has completed.


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