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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5142) MR AM unregisters with state KILLED when an error causes dispatcher to shutdown
Date Wed, 10 Apr 2013 19:55:15 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13628177#comment-13628177
] 

Jason Lowe commented on MAPREDUCE-5142:
---------------------------------------

This looks like the general case of MAPREDUCE-4993.
                
> 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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