[ https://issues.apache.org/jira/browse/YARN-5295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15351384#comment-15351384 ] 

Sunil G commented on YARN-5295:
-------------------------------

Thanks [~Prabhu Joseph] for the clarification.
Yes, we select a queue and then we do sanity after that. And if sanity check (validations) fails for this selected queue, we will reject the app submission. In this given scenario, may be a group configuration seems valid and the jira is focussing on that point. Got it. +1 for the approach.

Interestingly we need to see how 3rd point is to be handled {{3. is user either have ACL Submit_Applications or Administer_Queue of the queue.}}, we may possibly relax some ACLs here if we do that. If a user (user *test*) is not given permission to queue (queue named *test* in this context), and same user's group (group *edw*) has permission in another queue (queue named *platform* in this context), I think we have to give preference for user than group. So i think current implementation holds good for 3rd point. Thoughts? 

> YARN queue-mappings to check Queue is present before submitting job
> -------------------------------------------------------------------
>
>                 Key: YARN-5295
>                 URL: https://issues.apache.org/jira/browse/YARN-5295
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacity scheduler
>    Affects Versions: 2.7.2
>            Reporter: Prabhu Joseph
>
> In yarn Queue-Mappings, Yarn should check if the queue is present before submitting the job. If not present it should go to next mapping available.
> For example if we have
> yarn.scheduler.capacity.queue-mappings=u:%user:%user,g:edw:platform
> and I submit job with user "test" and if there is no "test" queue then it should check the second mapping (g:edw:platform) in the list and if test is part of edw group it should submit job in platform queue.
> Below Sanity checks has to be done for the mapped queue in the list and if it fails then the the next queue mapping has to be chosen, when there is no queue mapping passing the sanity check, only then the application has to be Rejected.
> 1. is queue present
> 2. is queue not a leaf queue
> 3. is user either have ACL Submit_Applications or Administer_Queue of the queue.



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