Botong Huang updated YARN-6704:
    Attachment: YARN-6704.v3.patch

v3 patch update: separate out reAttachUAM from launchUAM. Addressed [~subru]'s 
comment, rather than storing all _container->subclusterId_ mapping in NMSS, 
retrieve running containers from all home and secondary sub-clusters via 

> Add Federation Interceptor restart when work preserving NM is enabled
> ---------------------------------------------------------------------
>                 Key: YARN-6704
>                 URL: https://issues.apache.org/jira/browse/YARN-6704
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Botong Huang
>            Assignee: Botong Huang
>         Attachments: YARN-6704.v3.patch, YARN-6704-YARN-2915.v1.patch, 
> YARN-6704-YARN-2915.v2.patch
> YARN-1336 added the ability to restart NM without loosing any running 
> containers. {{AMRMProxy}} restart is added in YARN-6127. In a Federated YARN 
> environment, there's additional state in the {{FederationInterceptor}} to 
> allow for spanning across multiple sub-clusters, so we need to enhance 
> {{FederationInterceptor}} to support work-preserving restart.

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