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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13335) Add an option to suppress the 'use yarn jar' warning or remove it
Date Thu, 07 Jul 2016 21:11:10 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15366778#comment-15366778
] 

Siddharth Seth commented on HADOOP-13335:
-----------------------------------------

bq. I'm pretty much going to block anything that removes the warnings. So we can keep this
open, but it isn't going to go anywhere.
On what technical grounds ?
Printing a warning like this on branch-2 can be considered incompatible. That's ignoring the
bit that the warning itself doesn't necessarily make sense.

In terms of deprecation - I already see the following in trunk. "hadoop_deprecate_envvar YARN_OPTS
HADOOP_OPTS" - What exactly are we trying to achieve here, between the deprecation and the
push for yarn jar via this message.

> 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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