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https://issues.apache.org/jira/browse/YARN-1266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13815216#comment-13815216
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Mayank Bansal commented on YARN-1266:
-------------------------------------

bq. Correct my previous comment. It seems that we can have a single protocol, 
but AHS can have separate server-side implementation of it. YarnClient will 
then be modified to query the completed applications/attempts/containers from 
the AHS's implementation instead. It's similar to MRClientProtocol, which has 
two implementations in MR and in JHS.

If we anyway wants to do two implementations then the better choice would be 
root interface derived by both interfaces and have their own implementation.



> Adding ApplicationHistoryProtocolPBService
> ------------------------------------------
>
>                 Key: YARN-1266
>                 URL: https://issues.apache.org/jira/browse/YARN-1266
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Mayank Bansal
>            Assignee: Mayank Bansal
>         Attachments: YARN-1266-1.patch, YARN-1266-2.patch
>
>
> Adding ApplicationHistoryProtocolPBService to make web apps to work and 
> changing yarn to run AHS as a seprate process



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