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https://issues.apache.org/jira/browse/MAPREDUCE-6763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15428981#comment-15428981
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Varun Saxena commented on MAPREDUCE-6763:
-----------------------------------------
Committed to trunk, branch-2, branch-2.8 and branch-2.7
Thanks [~jlowe] for your contribution and [~nroberts] for the review.
> Shuffle server listen queue is too small
> ----------------------------------------
>
> Key: MAPREDUCE-6763
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6763
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Fix For: 2.8.0, 2.7.4
>
> Attachments: MAPREDUCE-6763.001.patch
>
>
> ShuffleHandler doesn't specify a listen queue length for the server port, so
> it ends up getting the default listen queue length of 50. This is too small
> to handle bursts of shuffle traffic on large clusters. It's also
> inconsistent with the default Hadoop uses for RPC servers (default=128).
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