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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9450) HADOOP_USER_CLASSPATH_FIRST is not honored; CLASSPATH is PREpended instead of APpended
Date Thu, 18 Apr 2013 10:47:17 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13635076#comment-13635076
] 

Hudson commented on HADOOP-9450:
--------------------------------

Integrated in Hadoop-Yarn-trunk #187 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/187/])
    HADOOP-9450. HADOOP_USER_CLASSPATH_FIRST is not honored; CLASSPATH is PREpended instead
of APpended. Contributed by Chris Nauroth and Harsh J. (harsh) (Revision 1469214)

     Result = FAILURE
harsh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1469214
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/bin/hadoop-config.cmd
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/bin/hadoop-config.sh

                
> HADOOP_USER_CLASSPATH_FIRST is not honored; CLASSPATH is PREpended instead of APpended
> --------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9450
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9450
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: scripts
>            Reporter: Mitch Wyle
>            Assignee: Harsh J
>             Fix For: 3.0.0, 1-win, 2.0.5-beta, 1.3.0
>
>         Attachments: HADOOP-9450-branch-1.patch, HADOOP-9450-branch-1-win.patch, HADOOP-9450-branch-2.patch,
HADOOP-9450.patch, HADOOP-9450.patch
>
>
> On line 133 of the hadoop shell wrapper, CLASSPATH is set as:
> CLASSPATH=${CLASSPATH}:${HADOOP_CLASSPATH}
> Notice that the built-up CLASSPATH, along with all the libs and unwanted JARS are pre-pended
BEFORE the user's HADOOP_CLASSPATH.  Therefore there is no way to put your own JARs in front
of those that the hadoop wrapper script sets.
> We propose a patch that reverses this order.  Failing that, we would like to add a command
line option to override this behavior and enable a user's JARs to be found before the wrong
ones in the Hadoop library paths.
> We always welcome your opinions.

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