Srikanth Sampath updated MAPREDUCE-6726:
    Attachment: MAPREDUCE-6726-MAPREDUCE-6608.002.patch

Refactored with enhancing the JvmID to include the application attempt Id

> YARN Registry based AM discovery with retry and in-flight task persistent via 
> ---------------------------------------------------------------------------------
>                 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: Srikanth Sampath
>         Attachments: MAPREDUCE-6726-MAPREDUCE-6608.001.patch, 
> MAPREDUCE-6726-MAPREDUCE-6608.001.patch, 
> MAPREDUCE-6726-MAPREDUCE-6608.002.patch, WorkPreservingMRAppMaster.pdf
> Several tasks will be achieved in this JIRA based on the demo patch in 
> 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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