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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5814) fat jar with *-default.xml may fail when mapreduce.job.classloader=true.
Date Thu, 27 Mar 2014 13:19:17 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13949280#comment-13949280
] 

Hadoop QA commented on MAPREDUCE-5814:
--------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12637135/MAPREDUCE-5814.v01.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc 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.

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

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/4463//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/4463//console

This message is automatically generated.

> fat jar with *-default.xml may fail when mapreduce.job.classloader=true.
> ------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5814
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5814
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 2.3.0
>            Reporter: Gera Shegalov
>            Assignee: Gera Shegalov
>         Attachments: MAPREDUCE-5814.v01.patch
>
>
> We faced a failure when a job.jar compiled against 0.20+ hadoop artifacts had to run
with {{mapreduce.job.classloader=true}} because it needed a more recent guava as a dependency.
The job failed because the cluster's {{*-default.xml}} files were overshadowed by the ones
in the fat jar. We propose to treat these default config files like the system packages {{org.apache.hadoop.}}
to avoid a counterintuitivie behavior as if we had {{mapreduce.job.user.classpath.first}}
set.



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