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https://issues.apache.org/jira/browse/YARN-3692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15491261#comment-15491261
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Naganarasimha G R commented on YARN-3692:
-----------------------------------------

Hi [~rohithsharma],
Overall the approach is fine but to add few nits more
# YarnClient. l no 186..187, {{String diagnosis}} i used better to sync it 
everywhere to the same lingo
# Similarly in YarnClientImpl ln no 412. 
# ClientRMService ln no 783 & 787, better to use append instead of "+"



> Allow REST API to set a user generated message when killing an application
> --------------------------------------------------------------------------
>
>                 Key: YARN-3692
>                 URL: https://issues.apache.org/jira/browse/YARN-3692
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Rajat Jain
>            Assignee: Rohith Sharma K S
>         Attachments: 0001-YARN-3692.patch, 0002-YARN-3692.patch, 
> 0003-YARN-3692.patch, 0004-YARN-3692.patch
>
>
> Currently YARN's REST API supports killing an application without setting a 
> diagnostic message. It would be good to provide that support.
> *Use Case*
> Usually this helps in workflow management in a multi-tenant environment when 
> the workflow scheduler (or the hadoop admin) wants to kill a job - and let 
> the user know the reason why the job was killed. Killing the job by setting a 
> diagnostic message is a very good solution for that. Ideally, we can set the 
> diagnostic message on all such interface:
> yarn kill -applicationId ... -diagnosticMessage "some message added by 
> admin/workflow"
> REST API { 'state': 'KILLED', 'diagnosticMessage': 'some message added by 
> admin/workflow'}



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