Subru Krishnan created YARN-3828:

             Summary: Add a flag in container to indicate whether it's an AM 
container or not 
                 Key: YARN-3828
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: nodemanager, resourcemanager
            Reporter: Subru Krishnan
            Assignee: Giovanni Matteo Fumarola

YARN-2022 adds a flag in RMContainer to indicate whether the container is an AM 
or not to skip pre-emption of AM containers. This JIRA proposes propagating 
this information to NMs as it's required by the AMRMProxy (YARN-2884/YARN-3666) 
to identify if the container is an AM for:
1) Security - for authorizing only AMs to communicate with RMs. For e.g.: this 
is useful to prevent DDos attacks by all containers of a malicious app.
2) Federation - to allow for transparently spanning an app across multiple 

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