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https://issues.apache.org/jira/browse/HADOOP-10285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13915257#comment-13915257
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Arpit Agarwal commented on HADOOP-10285:
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Thanks Chris,the patch looks good, couple of points:
# Can you please add a comment in the {{NameNodeRpcServer}} constructor
explaining why the service RPC endpoint supports {{refreshCallQueue}}?
# Is it easy to add an end-end test case now that the client and server pieces
are in place?
I am not sure if the {{TestHASafeMode}} failure is related. I can't repro it on
OS X or Centos 6 with your changes. I think it is a Jenkins quirk and I am
inclined to commit it even with the failure.
> Admin interface to swap callqueue at runtime
> --------------------------------------------
>
> Key: HADOOP-10285
> URL: https://issues.apache.org/jira/browse/HADOOP-10285
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Chris Li
> Attachments: HADOOP-10285.patch, HADOOP-10285.patch,
> HADOOP-10285.patch, bisection-test.patch, bisection-test.patch,
> bisection-test.patch, bisection-test.patch, bisection-test.patch
>
>
> We wish to swap the active call queue during runtime in order to do
> performance tuning without restarting the namenode.
> This patch adds the ability to refresh the call queue on the namenode,
> through dfsadmin -refreshCallQueue
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