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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-112) Race in localization can cause containers to fail
Date Tue, 26 Mar 2013 00:29:15 GMT

    [ https://issues.apache.org/jira/browse/YARN-112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13613342#comment-13613342
] 

Hadoop QA commented on YARN-112:
--------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12575428/yarn-112-20130325.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 javac{color}.  The applied patch generated 1362 javac compiler warnings
(more than the trunk's current 1361 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:red}-1 findbugs{color}.  The patch appears to introduce 1 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-yarn-project/hadoop-yarn/hadoop-yarn-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/594//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-YARN-Build/594//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-yarn-common.html
Javac warnings: https://builds.apache.org/job/PreCommit-YARN-Build/594//artifact/trunk/patchprocess/diffJavacWarnings.txt
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/594//console

This message is automatically generated.
                
> Race in localization can cause containers to fail
> -------------------------------------------------
>
>                 Key: YARN-112
>                 URL: https://issues.apache.org/jira/browse/YARN-112
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 0.23.3
>            Reporter: Jason Lowe
>            Assignee: omkar vinit joshi
>         Attachments: yarn-112-20130325.patch, yarn-112.20131503.patch
>
>
> On one of our 0.23 clusters, I saw a case of two containers, corresponding to two map
tasks of a MR job, that were launched almost simultaneously on the same node.  It appears
they both tried to localize job.jar and job.xml at the same time.  One of the containers failed
when it couldn't rename the temporary job.jar directory to its final name because the target
directory wasn't empty.  Shortly afterwards the second container failed because job.xml could
not be found, presumably because the first container removed it when it cleaned up.

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