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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3292) [Umbrella] Tests and/or tools for YARN backwards compatibility verification
Date Wed, 04 Mar 2015 00:14:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-3292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14346062#comment-14346062
] 

Vinod Kumar Vavilapalli commented on YARN-3292:
-----------------------------------------------

+1, this will be super useful in successfully supporting YARN rolling upgrades!

> [Umbrella] Tests and/or tools for YARN backwards compatibility verification
> ---------------------------------------------------------------------------
>
>                 Key: YARN-3292
>                 URL: https://issues.apache.org/jira/browse/YARN-3292
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Li Lu
>            Assignee: Li Lu
>              Labels: compatibility, rolling_upgrade, test, tools
>
> YARN-666 added the support to YARN rolling upgrade. In order to support this feature,
we made changes from many perspectives. There were many assumptions made together with these
existing changes. Future code changes may break these assumptions by accident, and hence break
the YARN rolling upgrades feature. 
> To simplify YARN RU regression tests, maybe we would like to create a set of tools/tests
that can verify YARN RU backward compatibility. 
> On the very first step, we may want to have a compatibility checker for important protocols
and APIs. We may also want to incorporate these tools into our test Jenkins runs, if necessary.




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