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https://issues.apache.org/jira/browse/MAPREDUCE-6726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17290657#comment-17290657
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Brahma Reddy Battula commented on MAPREDUCE-6726:
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[~junping_du]/[~srikanth.sampath]/[~jianhe] could you please review this and 
move forward, this is asked for 3.3.1 release..

> YARN Registry based AM discovery with retry and in-flight task persistent via 
> JHS
> ---------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6726
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6726
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: applicationmaster
>            Reporter: Junping Du
>            Assignee: D M Murali Krishna Reddy
>            Priority: Major
>             Fix For: 3.2.2
>
>         Attachments: MAPREDUCE-6726-MAPREDUCE-6608.001.patch, 
> MAPREDUCE-6726-MAPREDUCE-6608.001.patch, 
> MAPREDUCE-6726-MAPREDUCE-6608.002.patch, 
> MAPREDUCE-6726-MAPREDUCE-6608.003.patch, MAPREDUCE-6726.004.patch, 
> MAPREDUCE-6726.005.trunk.patch, TestReport.pdf, WorkPreservingMRAppMaster.pdf
>
>
> Several tasks will be achieved in this JIRA based on the demo patch in 
> MAPREDUCE-6608:
> 1. AM discovery base on YARN register service. Could be replaced by YARN-4758 
> later due to scale up issue.
> 2. Retry logic for TaskUmbilicalProtocol RPC connection
> 3. In-flight task recover after AM restart via JHS
> 4. Configuration to control the behavior compatible with previous when not 
> enable this feature (by default).
> All security related issues and other concerns discussed in MAPREDUCE-6608 
> will be addressed in follow up JIRAs.



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