Tao Jie updated HADOOP-15253:
    Attachment: HADOOP-15253.001.patch

> Should update maxQueueSize when refresh call queue
> --------------------------------------------------
>                 Key: HADOOP-15253
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15253
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Tao Jie
>            Assignee: Tao Jie
>            Priority: Minor
>         Attachments: HADOOP-15253.001.patch
> When calling {{dfsadmin -refreshCallQueue}} to update CallQueue instance, 
> {{maxQueueSize}} should also be updated.
> In case of changing CallQueue instance to FairCallQueue, the length of each 
> queue in FairCallQueue would be 1/priorityLevels of original length of 
> DefaultCallQueue. So it would be helpful for us to set the length of 
> callqueue to a proper value.

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