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https://issues.apache.org/jira/browse/HDFS-2244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13082754#comment-13082754
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Suresh Srinivas commented on HDFS-2244:
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Allen, datanode RPC protocols InterDatanodeProtocol and ClientDatanodeProtocol
are used rarely. The datanodes for the cluster you have posted may not have
seen any activity over Datanode RPC. Could that be the case here?
> JMX values for RPC Activity is always zero
> ------------------------------------------
>
> Key: HDFS-2244
> URL: https://issues.apache.org/jira/browse/HDFS-2244
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.20.204.0
> Reporter: Allen Wittenauer
> Priority: Blocker
> Attachments: screenshot-1.jpg
>
>
> jconsole is showing that the RPC metrics gathered for the datanode is always
> zero. Other metrics for the DN appears fine.
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