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https://issues.apache.org/jira/browse/MAPREDUCE-4813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13534119#comment-13534119
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Hadoop QA commented on MAPREDUCE-4813:
--------------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12561317/MAPREDUCE-4813-2.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 6 new
or modified test files.
{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-app
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3128//testReport/
Console output:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3128//console
This message is automatically generated.
> AM timing out during job commit
> -------------------------------
>
> Key: MAPREDUCE-4813
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4813
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: applicationmaster
> Affects Versions: 0.23.3, 2.0.1-alpha
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Critical
> Attachments: JobImplStateMachine.pdf, MAPREDUCE-4813-2.patch,
> MAPREDUCE-4813-2.patch, MAPREDUCE-4813.patch, MAPREDUCE-4813.patch,
> MAPREDUCE-4813.patch
>
>
> The AM calls the output committer's {{commitJob}} method synchronously during
> JobImpl state transitions, which means the JobImpl write lock is held the
> entire time the job is being committed. Holding the write lock prevents the
> RM allocator thread from heartbeating to the RM. Therefore if committing the
> job takes too long (e.g.: the job has tons of files to commit and/or the
> namenode is bogged down) then the AM appears to be unresponsive to the RM and
> the RM kills the AM attempt.
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