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https://issues.apache.org/jira/browse/YARN-8413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16509154#comment-16509154
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Sunil Govindan commented on YARN-8413:
--------------------------------------

Setting async to false means that the statement you are calling has to complete 
before the next statement in your function can be called. If you set async: 
true then that statement will begin it's execution and the next statement will 
be called regardless of whether the async statement has completed yet.

The statement we look here is to be sync. Hence marking it as false. Attached 
v1 patch.

[~rohithsharma] please help to review.

> Flow activity page is failing with "Timeline server failed with an error"
> -------------------------------------------------------------------------
>
>                 Key: YARN-8413
>                 URL: https://issues.apache.org/jira/browse/YARN-8413
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: yarn-ui-v2
>    Affects Versions: 3.1.1
>            Reporter: Yesha Vora
>            Assignee: Sunil Govindan
>            Priority: Major
>         Attachments: YARN-8413.001.patch
>
>
> Flow activity page is fail to load with "Timeline server failed with an error"
> This page uses incorrect flow call 
> "https://localhost:8188/ws/v2/timeline/flows?_=1528755339836"; and it is 
> failing to load.
> 1) Its using localhost instead ATS v2 hostname
> 2) Its using ATS v1.5 http port instead ATS v2 https port
> The correct rest call is "https://<atsv2 host>:<atsv2 https 
> port>/ws/v2/timeline/flows?_=1528755339836"



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