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From "Haibo Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6323) Rolling upgrade/config change is broken on timeline v2.
Date Mon, 15 May 2017 17:26:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-6323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16010938#comment-16010938
] 

Haibo Chen commented on YARN-6323:
----------------------------------

Thanks for the patch [~vrushalic]! I wonder if we should, to include as part of this jira,
store the flow context in the NM state store for a given application. If NM has always been
running with work preserving and ATSv2 on, because its flow context is not stored, any application
upon recovery will get a default flow context rather than their original flow context.

> Rolling upgrade/config change is broken on timeline v2. 
> --------------------------------------------------------
>
>                 Key: YARN-6323
>                 URL: https://issues.apache.org/jira/browse/YARN-6323
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Li Lu
>            Assignee: Vrushali C
>              Labels: yarn-5355-merge-blocker
>         Attachments: YARN-6323.001.patch
>
>
> Found this issue when deploying on real clusters. If there are apps running when we enable
timeline v2 (with work preserving restart enabled), node managers will fail to start due to
missing app context data. We should probably assign some default names to these "left over"
apps. I believe it's suboptimal to let users clean up the whole cluster before enabling timeline
v2. 



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