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https://issues.apache.org/jira/browse/MAPREDUCE-3421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13167846#comment-13167846
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Hitesh Shah commented on MAPREDUCE-3421:
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Being addressed as part of MAPREDUCE-3426.
RMCommunicator#stop gets invoked multiple times making the MR AM to unregister
more than once.
> Error in MR AM shutdown when running an uber-job
> ------------------------------------------------
>
> Key: MAPREDUCE-3421
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3421
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: mrv2
> Affects Versions: 0.23.0, 0.24.0
> Reporter: Hitesh Shah
> Fix For: 0.23.1
>
>
> Exception thrown during the un-registration process in the
> ContainerAllocator#stop. Exception trace in next comment.
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