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https://issues.apache.org/jira/browse/MAPREDUCE-2720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13281414#comment-13281414
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Sharad Agarwal commented on MAPREDUCE-2720:
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On thinking more on this, I think this is a special case of a shell command
application. So instead of having a parallel implementation, it makes sense to
use the MAPREDUCE-2720. The only downside is that shell command application
forks another process to run the command which can be avoided in a java app.
But that seems a very minor downside.
> MR-279: Write a simple Java application
> ---------------------------------------
>
> Key: MAPREDUCE-2720
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2720
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: mrv2
> Affects Versions: 2.0.0, 3.0.0
> Reporter: Sharad Agarwal
> Assignee: Devaraj K
> Attachments: MAPREDUCE-2720.patch
>
>
> Currently for isolation purposes, many simple java applications run in
> cluster with 1 map only job. (eg. Oozie). This is not really required with
> nextgen hadoop (mrv2) and *non-MR* apps are first class and easy to write.
> A simple hadoop java app can be written which runs in the cluster in the user
> space.
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