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https://issues.apache.org/jira/browse/YARN-6323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16119165#comment-16119165
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Vrushali C commented on YARN-6323:
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Any thoughts on this [~rohithsharma] [~varun_saxena] [~haibo.chen]
> 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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