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https://issues.apache.org/jira/browse/HADOOP-11485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14284358#comment-14284358
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Colin Patrick McCabe commented on HADOOP-11485:
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Sorry, this is probably a dumb question, but what "third parties" do we want to
be plugging shell commands in to {{./bin/hadoop}} ? Can't these guys just use
"yarn classpath" and / or "hadoop classpath" to get the Hadoop classpath, and
run their own jars? I'm not sure I see a benefit to the increased
complexity... maybe I'm missing something.
> Pluggable shell integration
> ---------------------------
>
> Key: HADOOP-11485
> URL: https://issues.apache.org/jira/browse/HADOOP-11485
> Project: Hadoop Common
> Issue Type: New Feature
> Components: scripts
> Affects Versions: 3.0.0
> Reporter: Allen Wittenauer
> Assignee: Allen Wittenauer
> Labels: scripts, shell
> Attachments: HADOOP-11485-00.patch, HADOOP-11485-01.patch,
> HADOOP-11485-02.patch
>
>
> It would be useful to provide a way for core and non-core Hadoop components
> to plug into the shell infrastructure. This would allow us to pull the HDFS,
> MapReduce, and YARN shell functions out of hadoop-functions.sh.
> Additionally, it should let 3rd parties such as HBase influence things like
> classpaths at runtime.
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