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https://issues.apache.org/jira/browse/YARN-7900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16367838#comment-16367838
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Botong Huang commented on YARN-7900:
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Hi [~asuresh], yes I understand. I don't think I am breaking this requirement 
though. After the flattening, everything in {{List<SchedulingRequest> 
schedulingRequests}} will still be put into the {{allocate}} call each time. I 
did this change because it simplify the code a bit, and the code pattern 
becomes more consistent with other channels, i.e. release, updates, blacklists. 
Please let me know what you think. 

> [AMRMProxy] AMRMClientRelayer for stateful FederationInterceptor
> ----------------------------------------------------------------
>
>                 Key: YARN-7900
>                 URL: https://issues.apache.org/jira/browse/YARN-7900
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Botong Huang
>            Assignee: Botong Huang
>            Priority: Major
>         Attachments: YARN-7900.v1.patch, YARN-7900.v2.patch
>
>
> Inside stateful FederationInterceptor (YARN-7899), we need a component 
> similar to AMRMClient that remembers all pending (outstands) requests we've 
> sent to YarnRM, auto re-register and do full pending resend when YarnRM fails 
> over and throws ApplicationMasterNotRegisteredException back. This JIRA adds 
> this component as AMRMClientRelayer.



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