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Hadoop QA commented on MAPREDUCE-5027: -------------------------------------- {color:green}+1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12571838/MAPREDUCE-5027-3.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:green}+1 tests included appear to 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/3378//testReport/ Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3378//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-5027-2.patch, MAPREDUCE-5027-3.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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira