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https://issues.apache.org/jira/browse/MAPREDUCE-5027?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Parker reassigned MAPREDUCE-5027:
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Assignee: Robert Parker
> Shuffle does not limit number of outstanding connections
> --------------------------------------------------------
>
> Key: MAPREDUCE-5027
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5027
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.0.3-alpha, 0.23.5
> Reporter: Jason Lowe
> Assignee: Robert Parker
>
> The ShuffleHandler does not have any configurable limits to the number of
> outstanding connections allowed. Therefore a node with many map outputs and
> many reducers in the cluster trying to fetch those outputs can exhaust a
> nodemanager out of file descriptors.
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