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https://issues.apache.org/jira/browse/HADOOP-4998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12662243#action_12662243
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Vinod K V commented on HADOOP-4998:
-----------------------------------
+1.
Of late, there have been many instances in which Mapred, particualrly the TT
side, started to depend on platform specific features. I guess the handling of
these can be made much easier with such a native runtime. Some of them I can
immediately think of are memory management of tasks by TT(HADOOP-3581),
starting tasks via job control(HADOOP-2721), starting tasks as the job
submitting user(HADOOP-4490). But I am not very sure as to which of these and
how much of it can be helped by a native runtime.
> 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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