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https://issues.apache.org/jira/browse/HADOOP-15253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16405657#comment-16405657
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Konstantin Shvachko commented on HADOOP-15253:
----------------------------------------------

The change looks good to me. Minor things for the unit test:
# import of {{DFSConfigKeys}} is redundant.
# Would be better to incorporate the check of the queue size change into 
{{testRefresh()}} instead of creating a new test case. That way the test will 
not start up mini cluster one more time, will run faster.

> 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
>    Affects Versions: 2.8.2
>            Reporter: Tao Jie
>            Assignee: Tao Jie
>            Priority: Minor
>         Attachments: HADOOP-15253.001.patch, HADOOP-15253.002.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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