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From "Varun Saxena (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6736) Consider writing to both ats v1 & v2 from RM for smoother upgrades
Date Wed, 09 Aug 2017 14:06:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16119939#comment-16119939
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Varun Saxena commented on YARN-6736:
------------------------------------

Final switch to v2 only would involve some kind of admin operation. We would have to switch
off timeline server v1 for instance.
If AHS/ATSv1 server is running, for instance even though we have decided to switch to v2,
client running the job may misconfigure v1 all across, get timeline delegation token from
the server and the job would publish entities to timeline v1 while RM/NM would publish to
v2. 
So, admin would need to shutdown ATSv1 server so that misconfiguration is caught at the time
of job submission itself.



> Consider writing to both ats v1 & v2 from RM for smoother upgrades
> ------------------------------------------------------------------
>
>                 Key: YARN-6736
>                 URL: https://issues.apache.org/jira/browse/YARN-6736
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Vrushali C
>            Assignee: Rohith Sharma K S
>         Attachments: YARN-6736-YARN-5355.001.patch
>
>
> When the cluster is being upgraded from atsv1 to v2, it may be good to have a brief time
period during which RM writes to both atsv1 and v2. This will help frameworks like Tez migrate
more smoothly. 



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