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https://issues.apache.org/jira/browse/HADOOP-2838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12715477#action_12715477
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Sharad Agarwal commented on HADOOP-2838:
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Adding a new MiniDFSCluster based test for this looks to be an overkill. 
Instead can we write a test by separating this functionality in a method and 
just testing that? Alternatively we can add to one of the existing 
MiniDFSCluster test.

> Add HADOOP_LIBRARY_PATH config setting so Hadoop will include external 
> directories for jni
> ------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-2838
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2838
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.16.0
>            Reporter: Owen O'Malley
>            Assignee: Amar Kamat
>         Attachments: HADOOP-2838-v1.0.patch, HADOOP-2838-v1.1.patch
>
>
> Currently there is no way to configure Hadoop to use external JNI 
> directories. I propose we add a new variable like HADOOP_CLASS_PATH that is 
> added to the JAVA_LIBRARY_PATH before the process is run.

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