[jira] [Commented] (HADOOP-18446) Add a re-queue metric to RpcMetrics.java to quantify the number of re-queue RPCs

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-18446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17601573#comment-17601573 ] 

ASF GitHub Bot commented on HADOOP-18446:
-----------------------------------------

ZanderXu opened a new pull request, #4871:
URL: https://github.com/apache/hadoop/pull/4871

   ### Description of PR
   Add a reQueue metric to RpcMetrics.java to quantify the number of RPCs reQueued. Because Observer NameNode will re-queue the rpc if the call processing should be postponed.
   There is no any metric to quantify the number of re-queue RPCs, so I think we should do it.
   
   
   




> Add a re-queue metric to RpcMetrics.java to quantify the number of re-queue RPCs
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-18446
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18446
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: ZanderXu
>            Assignee: ZanderXu
>            Priority: Minor
>
> Add a reQueue metric to RpcMetrics.java to quantify the number of RPCs reQueued.
> Because Observer NameNode will re-queue the rpc if the call processing should be postponed.
>  
> There is no any metric to quantify the number of re-queue RPCs, so I think we should do it.



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