Siqi Li commented on YARN-2811:

After I digging through the code, it seems that in 2.4 resource allocation for 
reserved containers doesn't check the queue maximum any more. That's why queues 
are exceeding their maximum when under a certain amount of load 

> Fair Scheduler is violating max memory settings in 2.4
> ------------------------------------------------------
>                 Key: YARN-2811
>                 URL: https://issues.apache.org/jira/browse/YARN-2811
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.4.0
>            Reporter: Siqi Li
> This has been seen on several queues showing the allocated MB going 
> significantly above the max MB and it appears to have started with the 2.4 
> upgrade. 

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