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https://issues.apache.org/jira/browse/YARN-1915?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Lowe updated YARN-1915:
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    Priority: Blocker  (was: Critical)

Per offline discussion with [~vinodkv] marking this as a blocker for 2.6.

> ClientToAMTokenMasterKey should be provided to AM at launch time
> ----------------------------------------------------------------
>
>                 Key: YARN-1915
>                 URL: https://issues.apache.org/jira/browse/YARN-1915
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>    Affects Versions: 2.2.0
>            Reporter: Hitesh Shah
>            Assignee: Jason Lowe
>            Priority: Blocker
>         Attachments: YARN-1915.patch, YARN-1915v2.patch, YARN-1915v3.patch
>
>
> Currently, the AM receives the key as part of registration. This introduces a 
> race where a client can connect to the AM when the AM has not received the 
> key. 
> Current Flow:
> 1) AM needs to start the client listening service in order to get host:port 
> and send it to the RM as part of registration
> 2) RM gets the port info in register() and transitions the app to RUNNING. 
> Responds back with client secret to AM.
> 3) User asks RM for client token. Gets it and pings the AM. AM hasn't 
> received client secret from RM and so RPC itself rejects the request.



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