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https://issues.apache.org/jira/browse/YARN-8504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16537164#comment-16537164
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Íñigo Goiri commented on YARN-8504:
-----------------------------------

This approach was introduced by YARN-3406.
YARN-7608 did a very similar fix to this one.
This shows that we have a problem maintaining this code as every time something 
is added this breaks.
We should add some unit test to make sure we have this working properly.

> Incorrect sTarget column causing DataTable warning on RM application and 
> scheduler web page and application history server webpage
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-8504
>                 URL: https://issues.apache.org/jira/browse/YARN-8504
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: tianjuan
>            Priority: Major
>         Attachments: YARN-8504.001.patch, image-2018-07-09-12-09-21-401.png, 
> image-2018-07-09-12-12-18-131.png
>
>
>  On a cluster built from latest trunk, click 'State' at application history 
> webpage  gives following warning
>  *DataTables warning (table id = 'apps'): Requested unknown parameter '9' 
> from the data source for row 0*
> and click 'Cluster' at RM applications page gives following warning
>   !image-2018-07-09-12-09-21-401.png!



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