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From "Ray Chiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6142) Support rolling upgrade between 2.x and 3.x
Date Fri, 20 Oct 2017 21:13:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16213251#comment-16213251
] 

Ray Chiang commented on YARN-6142:
----------------------------------

I'm done with the JACC analysis, but need to do the same type of writeup that was done for
protobuf.

The quick answer is that we don't have any major red flags, but I'm going to note some potential
incompatibilities that are very minor, but could affect some random API user out there.

> Support rolling upgrade between 2.x and 3.x
> -------------------------------------------
>
>                 Key: YARN-6142
>                 URL: https://issues.apache.org/jira/browse/YARN-6142
>             Project: Hadoop YARN
>          Issue Type: Task
>          Components: rolling upgrade
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Andrew Wang
>            Assignee: Ray Chiang
>            Priority: Blocker
>
> Counterpart JIRA to HDFS-11096. We need to:
> * examine YARN and MR's  JACC report for binary and source incompatibilities
> * run the [PB differ|https://issues.apache.org/jira/browse/HDFS-11096?focusedCommentId=15816405&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15816405]
that Sean wrote for HDFS-11096 for the YARN PBs.
> * sanity test some rolling upgrades between 2.x and 3.x. Ideally these are automated
and something we can run upstream.



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