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https://issues.apache.org/jira/browse/YARN-5519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15419741#comment-15419741
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Subru Krishnan commented on YARN-5519:
--------------------------------------

Thanks [~ellenfkh] for the patch. It mostly looks good, couple of minor 
comments:
  * Add Javadocs for the getter/setter for new _subClusterId_ field in 
{{AddApplicationHomeSubClusterResponse}}. Mention clearly that the 
_subClusterId_  in response might be different from input in casing the mapping 
already exists.
  * The changes in 
{{MemoryFederationStateStore::updateApplicationHomeSubCluster}} are redundant.

> Add SubClusterId in AddApplicationHomeSubClusterResponse for Router Failover
> ----------------------------------------------------------------------------
>
>                 Key: YARN-5519
>                 URL: https://issues.apache.org/jira/browse/YARN-5519
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Giovanni Matteo Fumarola
>            Assignee: Ellen Hui
>         Attachments: YARN-5519-YARN-2915.v1.patch
>
>
> This JIRA tracks the addition of SubClusterId into 
> AddApplicationHomeSubClusterResponse. 
> in the design of [YARN-3659|https://issues.apache.org/jira/browse/YARN-3659], 
> to handle better fail-over scenario the response needs SubclusterId as field.



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