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https://issues.apache.org/jira/browse/MAPREDUCE-5027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13594598#comment-13594598
]
Hudson commented on MAPREDUCE-5027:
-----------------------------------
Integrated in Hadoop-Yarn-trunk #147 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/147/])
MAPREDUCE-5027. Shuffle does not limit number of outstanding connections
(Robert Parker via jeagles) (Revision 1453098)
Result = SUCCESS
jeagles :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1453098
Files :
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/main/java/org/apache/hadoop/mapred/ShuffleHandler.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/test/java/org/apache/hadoop/mapred/TestShuffleHandler.java
> 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
> Fix For: 3.0.0, 0.23.7, 2.0.4-beta
>
> Attachments: MAPREDUCE-5027-2.patch, MAPREDUCE-5027-3.patch,
> MAPREDUCE-5027-4.patch, MAPREDUCE-5027-b023-2.patch,
> MAPREDUCE-5027-b023.patch, MAPREDUCE-5027.patch, MAPREDUCE-5027.patch
>
>
> 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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