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https://issues.apache.org/jira/browse/YARN-3924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14694745#comment-14694745
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Rohith Sharma K S commented on YARN-3924:
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bq. A more informative error message might be enough here?
Yes, user wants to differentiate RM state like *StandbyRM* VS *Not Started
RM/attempt to connect invalid RM ha-ids*. So error message would help more.
> Submitting an application to standby ResourceManager should respond better
> than Connection Refused
> --------------------------------------------------------------------------------------------------
>
> Key: YARN-3924
> URL: https://issues.apache.org/jira/browse/YARN-3924
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Reporter: Dustin Cote
> Assignee: Ajith S
> Priority: Minor
>
> When submitting an application directly to a standby resource manager, the
> resource manager responds with 'Connection Refused' rather than indicating
> that it is a standby resource manager. Because the resource manager is aware
> of its own state, I feel like we can have the 8032 port open for standby
> resource managers and reject the request with something like 'Cannot process
> application submission from this standby resource manager'.
> This would be especially helpful for debugging oozie problems when users put
> in the wrong address for the 'jobtracker' (i.e. they don't put the logical RM
> address but rather point to a specific resource manager).
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