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https://issues.apache.org/jira/browse/YARN-2837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14233294#comment-14233294
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Li Lu commented on YARN-2837:
-----------------------------

Agree to [~zjshen]'s suggestion. Let's do that in a separate Jira. I'd +1 this 
patch, and maybe some committers would like to take a look at it? 

> Timeline server needs to recover the timeline DT when restarting
> ----------------------------------------------------------------
>
>                 Key: YARN-2837
>                 URL: https://issues.apache.org/jira/browse/YARN-2837
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: timelineserver
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
>            Priority: Blocker
>             Fix For: 2.7.0
>
>         Attachments: YARN-2837.1.patch, YARN-2837.2.patch, YARN-2837.3.patch
>
>
> Timeline server needs to recover the stateful information when restarting as 
> RM/NM/JHS does now. So far the stateful information only includes the 
> timeline DT. Without recovery, the timeline DT of the existing YARN apps is 
> not long valid, and cannot be renewed any more after the timeline server is 
> restarted.



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