Sunil G commented on YARN-2055:

Thank you Mayank for the clarification.
I have a small doubt here. In such scenarios, is it like scheduler should not 
assign any more container for Queue A?
Assuming that here Queue B is demand is there, then only Queue B's requests has 
to be served first. Am I correct?

> Preemption: Jobs are failing due to AMs are getting launched and killed 
> multiple times
> --------------------------------------------------------------------------------------
>                 Key: YARN-2055
>                 URL: https://issues.apache.org/jira/browse/YARN-2055
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 2.4.0
>            Reporter: Mayank Bansal
> If Queue A does not have enough capacity to run AM, then AM will borrow 
> capacity from queue B to run AM in that case AM will be killed if queue B 
> will reclaim its capacity and again AM will be launched and killed again, in 
> that case job will be failed.

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