Jason Lowe created MAPREDUCE-5027:
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Summary: 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: 0.23.5, 2.0.3-alpha
Reporter: Jason Lowe
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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