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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 Tue, 23 Oct 2012 00:54:13 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13481997#comment-13481997
] 

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

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12550362/MAPREDUCE-4458.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}.  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/2960//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2960//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.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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