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https://issues.apache.org/jira/browse/MAPREDUCE-7152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17904210#comment-17904210
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Peter Bacsko commented on MAPREDUCE-7152:
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[~wuchang1989] I'm sorry, but since then I've moved to another project and I'm
no longer working on MR2/YARN.
Ping [~pszucs] maybe he can help, he's currently active on Hadoop.
> LD_LIBRARY_PATH is always passed from MR AM to tasks
> ----------------------------------------------------
>
> Key: MAPREDUCE-7152
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7152
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Peter Bacsko
> Assignee: Peter Bacsko
> Priority: Major
> Attachments: MAPREDUCE-7152-NMAdminEnvPOC_POC01.patch,
> MAPREDUCE-7152-lazyEval_POC01.patch
>
>
> {{LD_LIBRARY_PATH}} is set to {{$HADOOP_COMMON_HOME/lib/native}} by default
> in Hadoop (as part of {{mapreduce.admin.user.env}} and
> {{yarn.app.mapreduce.am.user.env}}), and passed as an environment variable
> from AM container to task containers in the container launch context.
> In cases where {{HADOOP_COMMON_HOME}} is different in AM node and task node,
> tasks will fail to load native library. A reliable way to fix this is to add
> {{LD_LIBRARY_PATH}} in {{yarn.nodemanager.admin-env}} instead.
> Another approach is to perform a lazy evaluation of {{LD_LIBRARY_PATH}} on
> the NM side.
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