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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4458) Warn if java.library.path is used for AM or Task
Date Fri, 04 Jan 2013 16:50:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13544015#comment-13544015
] 

Hadoop QA commented on MAPREDUCE-4458:
--------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12563106/MAPREDUCE-4458-2.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 1 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-jobclient.

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

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3196//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3196//console

This message is automatically generated.
                
> Warn if java.library.path is used for AM or Task
> ------------------------------------------------
>
>                 Key: MAPREDUCE-4458
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4458
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2
>    Affects Versions: 0.23.3, 3.0.0, 2.0.2-alpha
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Parker
>         Attachments: MAPREDUCE-4458-2.patch, MAPREDUCE-4458.patch
>
>
> If java.library.path is used on the command line for launching an MRAppMaster or an MR
Task, it could conflict with how standard Hadoop/HDFS JNI libraries and dependencies are found.
 At a minimum the client should output a warning and ask the user to switch to LD_LIBRARY_PATH.
 It would be nice to automatically do this for them but parsing the command line is scary
so just a warning is probably good enough for now.

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