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https://issues.apache.org/jira/browse/HADOOP-11460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15366786#comment-15366786
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Allen Wittenauer commented on HADOOP-11460:
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FYI: updated releasenote to reflect the fix in HADOOP-13349.
HADOOP_USER_CLASSPATH was going to happen but didn't.
> Deprecate shell vars
> --------------------
>
> Key: HADOOP-11460
> URL: https://issues.apache.org/jira/browse/HADOOP-11460
> Project: Hadoop Common
> Issue Type: Improvement
> Components: scripts
> Affects Versions: 3.0.0-alpha1
> Reporter: Allen Wittenauer
> Assignee: John Smith
> Labels: scripts, shell
> Fix For: 3.0.0-alpha1
>
> Attachments: HADOOP-11460-00.patch, HADOOP-11460-01.patch,
> HADOOP-11460-02.patch, HADOOP-11460-03.patch, HADOOP-11460-04.patch
>
>
> It is a very common shell pattern in 3.x to effectively replace sub-project
> specific vars with generics. We should have a function that does this
> replacement and provides a warning to the end user that the old shell var is
> deprecated. Additionally, we should use this shell function to deprecate the
> shell vars that are holdovers already.
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