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https://issues.apache.org/jira/browse/YARN-978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13735624#comment-13735624
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Hitesh Shah commented on YARN-978:
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In terms of duplication: diagnostics, host and rpcPort are unique for each 
attempt and can be useful to know about. I am not sure from a historical point 
of view whether rpc port is useful but definitely needed for a running attempt. 
The finalApplicationStatus is only set for the last attempt. The internal 
*hidden behind proxy* tracker url is different for each attempt but not exposed 
to the user. The tracker url either points to the current running attempt or to 
the history server hence a question as to whether it is needed for each 
attempt. 

 
                
> [YARN-321] Adding ApplicationAttemptReport and Protobuf implementation
> ----------------------------------------------------------------------
>
>                 Key: YARN-978
>                 URL: https://issues.apache.org/jira/browse/YARN-978
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Mayank Bansal
>            Assignee: Xuan Gong
>             Fix For: YARN-321
>
>         Attachments: YARN-978-1.patch, YARN-978.2.patch, YARN-978.3.patch
>
>
> We dont have ApplicationAttemptReport and Protobuf implementation.
> Adding that.
> Thanks,
> Mayank

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