[jira] [Created] (MAPREDUCE-5142) MR AM unregisters with state KILLED when an error causes dispatcher to shutdown

["Hitesh Shah (JIRA)" <ji...@apache.org>]

Hitesh Shah created MAPREDUCE-5142:
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             Summary: MR AM unregisters with state KILLED when an error causes dispatcher to shutdown
                 Key: MAPREDUCE-5142
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5142
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Hitesh Shah


RMCommunicator sets final state to KILLED if the job is in a running state and isSignalled is set to true. 

{code}
      } else if (jobImpl.getInternalState() == JobStateInternal.KILLED
          || (jobImpl.getInternalState() == JobStateInternal.RUNNING && isSignalled)) {
        finishState = FinalApplicationStatus.KILLED;
      } else if (jobImpl.getInternalState() == JobStateInternal.FAILED
          || jobImpl.getInternalState() == JobStateInternal.ERROR) {
        finishState = FinalApplicationStatus.FAILED;
{code}

This happens when for some reason, there is an exception in a state machine's event handler causing AsyncDispatcher to trigger a shutdown. In such a scenario, even though the AM actually failed due to some error, its actual state ends up as KILLED.




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