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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3067) Container exit status not set properly to launched process's exit code on successful completion of process
Date Thu, 22 Sep 2011 06:23:26 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13112355#comment-13112355
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Vinod Kumar Vavilapalli commented on MAPREDUCE-3067:
----------------------------------------------------

bq. [..] why the exit status does not need to be checked for map/reduce task containers.
In MRV2 framework, successful maps and reduces directly talk to the AM via {{TaskUmbilicalProtocol.done()}}.
If the task JVM happens to crash after the done() call, it doesn't really affect the real
outcome of the task - so no point in checking the exit code to be zero. For failed and crashed
tasks, we can just use the exit-code to let the user know via web-UI/command-line.

Other frameworks, like the DistributedShell you are writing, may not have this direct communication
between container and AM and so can leverage the exit-code for figuring out the outcome of
the containers.

> Container exit status not set properly to launched process's exit code on successful
completion of process
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3067
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3067
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Hitesh Shah
>            Assignee: Hitesh Shah
>             Fix For: 0.23.0
>
>
> When testing the distributed shell sample app master, the container exit status was being
returned incorrectly. 
> 11/09/21 11:32:58 INFO DistributedShell.ApplicationMaster: Got container status for containerID=
container_1316629955324_0001_01_000002, state=COMPLETE, exitStatus=-1000, diagnostics=

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