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https://issues.apache.org/jira/browse/HADOOP-4998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12663068#action_12663068
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Allen Wittenauer commented on HADOOP-4998:
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FWIW, we have already seen a condition where the secondary name node required
more memory to operate than the primary name node to do a shell out due to a
requirement to run whoami or id or whatever due to DFSClient being in the code
path. (As it was explained to me and/or as I understood it). From an ops
perspective, this is highly suspect.... ;)
> Implement a native OS runtime for Hadoop
> ----------------------------------------
>
> Key: HADOOP-4998
> URL: https://issues.apache.org/jira/browse/HADOOP-4998
> Project: Hadoop Core
> Issue Type: New Feature
> Components: native
> Reporter: Arun C Murthy
> Assignee: Arun C Murthy
> Fix For: 0.21.0
>
>
> It would be useful to implement a JNI-based runtime for Hadoop to get access
> to the native OS runtime. This would allow us to stop relying on exec'ing
> bash to get access to information such as user-groups, process limits etc.
> and for features such as chown/chgrp (org.apache.hadoop.util.Shell).
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