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https://issues.apache.org/jira/browse/MAPREDUCE-6518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14968009#comment-14968009
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Jason Lowe commented on MAPREDUCE-6518:
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+1 lgtm. Committing this.
> Set SO_KEEPALIVE on shuffle connections
> ---------------------------------------
>
> Key: MAPREDUCE-6518
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6518
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2, nodemanager
> Affects Versions: 2.7.1
> Reporter: Nathan Roberts
> Assignee: Chang Li
> Attachments: MAPREDUCE-6518.4.patch, YARN-4052.2.patch,
> YARN-4052.3.patch, YARN-4052.patch
>
>
> Shuffle handler does not set SO_KEEPALIVE so we've seen cases where
> FDs/sockets get stuck in ESTABLISHED state indefinitely because the server
> did not see the client leave (network cut or otherwise).
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