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From "Xuan Gong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4577) Enable aux services to have their own custom classpath/jar file
Date Thu, 11 Feb 2016 18:28:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-4577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15143207#comment-15143207
] 

Xuan Gong commented on YARN-4577:
---------------------------------

[~sjlee0] Thanks for the review. Looks like we reviewed a incorrect patch.

https://issues.apache.org/jira/secure/attachment/12786365/YARN-4577.20160204.patch is correct
one..

Sorry for the inconsistent naming of the patch. Could you review the patch ?

> Enable aux services to have their own custom classpath/jar file
> ---------------------------------------------------------------
>
>                 Key: YARN-4577
>                 URL: https://issues.apache.org/jira/browse/YARN-4577
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.8.0
>            Reporter: Xuan Gong
>            Assignee: Xuan Gong
>         Attachments: YARN-4577.1.patch, YARN-4577.2.patch, YARN-4577.20160119.1.patch,
YARN-4577.20160204.patch, YARN-4577.3.patch, YARN-4577.3.rebase.patch, YARN-4577.4.patch
>
>
> Right now, users have to add their jars to the NM classpath directly, thus put them on
the system classloader. But if multiple versions of the plugin are present on the classpath,
there is no control over which version actually gets loaded. Or if there are any conflicts
between the dependencies introduced by the auxiliary service and the NM itself, they can break
the NM, the auxiliary service, or both.
> The solution could be: to instantiate aux services using a classloader that is different
from the system classloader.



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