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From "Kuhu Shukla (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TEZ-3758) Vertex can hang in RUNNING state when two task attempts finish very closely and have retroactive failures
Date Fri, 09 Jun 2017 20:28:18 GMT
Kuhu Shukla created TEZ-3758:
--------------------------------

             Summary: Vertex can hang in RUNNING state when two task attempts finish very
closely and have retroactive failures
                 Key: TEZ-3758
                 URL: https://issues.apache.org/jira/browse/TEZ-3758
             Project: Apache Tez
          Issue Type: Bug
    Affects Versions: 0.7.1, 0.9.0
            Reporter: Kuhu Shukla
            Assignee: Kuhu Shukla


A vertex's count of what tasks are done can go off in a case where two task attempts finish
very closely, say within a millisecond of each other. We had a case where this task, which
was marked successful, never scheduled another attempt upon getting a retroactive failure
since it thought it had one uncompleted task attempt already. This is because the attempt
that finished 1 ms later transitioned to SUCCEEDED but we don't take any action on the taskAttempStatus
data structure and it stays false. This JIRA will attempt to solve that race.



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