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https://issues.apache.org/jira/browse/MAPREDUCE-4437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13414072#comment-13414072
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Hadoop QA commented on MAPREDUCE-4437:
--------------------------------------
+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12536456/MAPREDUCE-4437.patch
against trunk revision .
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 1 new or modified test
files.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 eclipse:eclipse. The patch built with eclipse:eclipse.
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed unit tests in
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2588//testReport/
Console output:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2588//console
This message is automatically generated.
> Race in MR ApplicationMaster can cause reducers to never be scheduled
> ---------------------------------------------------------------------
>
> Key: MAPREDUCE-4437
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4437
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: applicationmaster, mrv2
> Affects Versions: 0.23.3, 2.0.1-alpha
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Critical
> Attachments: MAPREDUCE-4437.patch
>
>
> If the MR AM is notified of container completion by the RM before the AM
> receives notification of the container cleanup from the NM then it can fail
> to schedule reducers indefinitely. Logs showing the issue to follow.
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