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https://issues.apache.org/jira/browse/HADOOP-13335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15363520#comment-15363520
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Allen Wittenauer commented on HADOOP-13335:
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I'm pretty much -1 on changing this in trunk. The warning is there for a
reason. If 3rd parties want to explicitly go against that advice, then they
just need to unset the given YARN env vars prior to launching hadoop jar.
Unsetting those prior to launching hadoop jar has no impact since they aren't
referenced at all in that code path. Therefore, no functionality is lost.
This is also much simpler than adding Yet Another Configuration Variable and
puts the onus on the caller to do whatever they want to do without putting more
code maintenance on Hadoop.
> Add an option to suppress the 'use yarn jar' warning or remove it
> -----------------------------------------------------------------
>
> Key: HADOOP-13335
> URL: https://issues.apache.org/jira/browse/HADOOP-13335
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 2.7.0
> Reporter: Siddharth Seth
> Assignee: Siddharth Seth
> Attachments: HADOOP-13335.01.patch, HADOOP-13335.02.patch,
> HADOOP-13335.02_branch-2.patch, HADOOP-13335.03.patch,
> HADOOP-13335.03_branch-2.patch, HADOOP-13335.04.patch
>
>
> https://issues.apache.org/jira/browse/HADOOP-11257 added a 'deprecation'
> warning for 'hadoop jar'.
> hadoop jar is used for a lot more that starting jobs. As an example - hive
> uses it to start all it's services (HiveServer2, the hive client, beeline
> etc).
> Using 'yarn jar' for to start these services / tools doesn't make a lot of
> sense - there's no relation to yarn other than requiring the classpath to
> include yarn libraries.
> I'd propose reverting the changes where this message is printed if YARN
> variables are set (leave it in the help message), or adding a mechanism which
> would allow users to suppress this WARNING.
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