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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4993) AM thinks it was killed when an error occurs setting up a task container launch context
Date Wed, 06 Mar 2013 16:06:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13594818#comment-13594818
] 

Jason Lowe commented on MAPREDUCE-4993:
---------------------------------------

Setting the diagnostics isn't sufficient if we then continue to throw the exception.  As mentioned
above, the exception ends up bubbling all the way up to the AsyncDispatcher handler thread
which forcibly exits the process.  That's not good and leads to a misleading status like KILLED.
 There needs to be better exception handling as well as diagnostics.
                
> AM thinks it was killed when an error occurs setting up a task container launch context
> ---------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4993
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4993
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mr-am
>    Affects Versions: 2.0.3-alpha, 0.23.5
>            Reporter: Jason Lowe
>            Assignee: Abhishek Kapoor
>
> If an IOException occurs while setting up a container launch context for a task then
the AM exits with a KILLED status and no diagnostics.  The job should be marked as FAILED
(or maybe ERROR) with a useful diagnostics message indicating the nature of the error.

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