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https://issues.apache.org/jira/browse/MAPREDUCE-6261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326424#comment-14326424
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Jason Lowe commented on MAPREDUCE-6261:
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+1 lgtm. Committing this.
> NullPointerException if MapOutputBuffer.flush invoked twice
> -----------------------------------------------------------
>
> Key: MAPREDUCE-6261
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6261
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 2.5.0
> Reporter: Jason Lowe
> Assignee: Tsuyoshi OZAWA
> Attachments: MAPREDUCE-6261.1.patch, MAPREDUCE-6261.2.patch
>
>
> MapOutputBuffer.flush will throw an NPE if it is invoked twice, since it
> blindly assumes kvbuffer is not null yet sets kvbuffer to null towards the
> end of the method.
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