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https://issues.apache.org/jira/browse/HBASE-2146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12802423#action_12802423
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Lars George commented on HBASE-2146:
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Hmm, I checked both cluster then they have the exact same hadoop-metrics, 
hbase-env and so on. All diff"ed by my a few times. So why is that cluster 
different. What is even weirder is that these are MetricsTimeVaryingRate 
instances so they must be declared and put into the MetricsRegistry before 
createMBean() is called. And I cannot find where that is done!

> RPC related metrics are missing in 0.20.3 since recent changes
> --------------------------------------------------------------
>
>                 Key: HBASE-2146
>                 URL: https://issues.apache.org/jira/browse/HBASE-2146
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.3
>            Reporter: Lars George
>             Fix For: 0.20.4, 0.21.0
>
>         Attachments: jconsole-hbase-rpc.png, jmx-diffs.txt
>
>
> Since the recent change to the Metrics setup it seems that the RPC related 
> stats have been completely dropped. See attached files for details.

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