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https://issues.apache.org/jira/browse/HDFS-16641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17601574#comment-17601574
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ASF GitHub Bot commented on HDFS-16641:
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ZanderXu closed pull request #4496: HDFS-16641. [SBN read] Add a metric to 
quantify the number of re-enter rpcs
URL: https://github.com/apache/hadoop/pull/4496




> [HDFS] Add RPC ReQueue Metrics
> ------------------------------
>
>                 Key: HDFS-16641
>                 URL: https://issues.apache.org/jira/browse/HDFS-16641
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: ZanderXu
>            Assignee: ZanderXu
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> Add RPC ReQueue Metrics to easily locate the abnormal case that 
> ObserverNameNode has lower RPCProcessingTime and higher RPCQueueTime.



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