Miklos Szegedi commented on YARN-8009:

Thank you for raising this [~sachinjose2...@gmail.com]. Normally the 
Application Master has the ability to specify the amount of containers. It can 
then provide an option to the user. See the the distributed shell example for 


> YARN limit number of simultaneously running containers in the application 
> level
> -------------------------------------------------------------------------------
>                 Key: YARN-8009
>                 URL: https://issues.apache.org/jira/browse/YARN-8009
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: yarn
>    Affects Versions: 3.0.0
>            Reporter: Sachin Jose
>            Priority: Minor
>              Labels: features
> It would be really useful if the user can specify maximum containers can be 
> running simultaneously in the application level. Most of the long running 
> YARN application can be benefited out of it. At this moment, the only 
> available option to restrict resource over usage of long running is in the 
> YARN resource manager queue level.

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