[jira] Commented: (HADOOP-2838) Add HADOOP_LIBRARY_PATH config setting so Hadoop will include external directories for jni

["Christian Kunz (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-2838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12641195#action_12641195 ] 

Christian Kunz commented on HADOOP-2838:
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I see a use case for this proposal.

HADOOP-2867 allows to load shared libraries via symbolic links pointing to localized cache files.
This would apply to libhdfs library

On the other hand, libhdfs is part of the Hadoop release and is likely locally available on all the nodes. By being able to set LD_LIBRARY_PATH to some static location, the need to use DistributedCache for dynamically loading libhdfs could be avoided.

> 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: scripts
>    Affects Versions: 0.16.0
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>
> 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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