Subru Krishnan updated YARN-4083:
    Description:     (was: We introduce the notion of an RMProxy, running on 
each node (or once per rack). Upon start the AM is forced (via tokens and 
configuration) to direct all its requests to a new services running on the NM 
that provide a proxy to the central RM. 

This give us a place to:
1) perform distributed scheduling decisions
2) throttling mis-behaving AMs
3) mask the access to a federation of RMs)

> Add a discovery mechanism for the scheduler addresss
> ----------------------------------------------------
>                 Key: YARN-4083
>                 URL: https://issues.apache.org/jira/browse/YARN-4083
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Subru Krishnan
>            Assignee: Subru Krishnan

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