Botong Huang commented on YARN-7652:

Hi [~Sammi], yes please push it to next release. Thanks! 

> Handle AM register requests asynchronously in FederationInterceptor
> -------------------------------------------------------------------
>                 Key: YARN-7652
>                 URL: https://issues.apache.org/jira/browse/YARN-7652
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: amrmproxy, federation
>    Affects Versions: 2.9.0, 3.0.0
>            Reporter: Subru Krishnan
>            Assignee: Botong Huang
>            Priority: Major
> We (cc [~goiri]/[~botong]) observed that the {{FederationInterceptor}} in 
> {{AMRMProxy}} (and consequently the AM) is blocked if the _StateStore_ has 
> outdated info about a _SubCluster_. This is because we handle AM register 
> requests synchronously. This jira proposes to move to async similar to how we 
> operate with allocate invocations.

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