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https://issues.apache.org/jira/browse/MAPREDUCE-5027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13587836#comment-13587836
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Hadoop QA commented on MAPREDUCE-5027:
--------------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12571092/MAPREDUCE-5027.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:red}-1 one of tests included doesn't have a timeout.{color}
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3366//testReport/
Console output:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3366//console
This message is automatically generated.
> 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
> Attachments: 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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