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https://issues.apache.org/jira/browse/YARN-4356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15009932#comment-15009932
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Li Lu commented on YARN-4356:
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Thanks for the long list [~sjlee0] and [~jrottinghuis]! I'm gradually shifting 
my cycles back to v2 work right now, and would like to help verifying this for 
2.8 release. Any concrete action items I can take? 

Meanwhile, if we're fine with the current version setting in YARN-4234, shall 
we push that JIRA forward? 

> ensure the timeline service v.2 is disabled cleanly and has no impact when 
> it's turned off
> ------------------------------------------------------------------------------------------
>
>                 Key: YARN-4356
>                 URL: https://issues.apache.org/jira/browse/YARN-4356
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Sangjin Lee
>            Assignee: Sangjin Lee
>            Priority: Critical
>              Labels: yarn-2928-1st-milestone
>
> For us to be able to merge the first milestone drop to trunk, we want to 
> ensure that once disabled the timeline service v.2 has no impact from the 
> server side to the client side. If the timeline service is not enabled, no 
> action should be done. If v.1 is enabled but not v.2, v.1 should behave the 
> same as it does before the merge.



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