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https://issues.apache.org/jira/browse/YARN-1053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13827285#comment-13827285
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Bikas Saha commented on YARN-1053:
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lets add add a null check or else literally "null" will be printed if the
diagnostics was null
> Diagnostic message from ContainerExitEvent is ignored in ContainerImpl
> ----------------------------------------------------------------------
>
> Key: YARN-1053
> URL: https://issues.apache.org/jira/browse/YARN-1053
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 2.2.0, 2.2.1
> Reporter: Omkar Vinit Joshi
> Assignee: Omkar Vinit Joshi
> Priority: Blocker
> Labels: newbie
> Fix For: 2.3.0, 2.2.1
>
> Attachments: YARN-1053.20130809.patch
>
>
> If the container launch fails then we send ContainerExitEvent. This event
> contains exitCode and diagnostic message. Today we are ignoring diagnostic
> message while handling this event inside ContainerImpl. Fixing it as it is
> useful in diagnosing the failure.
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