Steve Loughran commented on YARN-4083:

+1 for some dynamicness, either the AM declares this or ZK does the heavy 
lifting (the YARN registry can publish the info)

What's the security story here? That is: how do AM IP filters know when to 
bounce an HTTP Request over to the proxy?

> 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: Improvement
>          Components: nodemanager, resourcemanager
>            Reporter: Subru Krishnan
>            Assignee: Subru Krishnan
> Today many apps like Distributed Shell, REEF, etc rely on the fact that the 
> HADOOP_CONF_DIR of the NM is on the classpath to discover the scheduler 
> address. This JIRA proposes the addition of an explicit discovery mechanism 
> for the scheduler address

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