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https://issues.apache.org/jira/browse/HADOOP-2645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12560170#action_12560170
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Sanjay Radia commented on HADOOP-2645:
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The MBean server doe snot cal these method automatically.
It is called on demand if a JMX client call this.
However since JMX console has a convenient graphing tool for numeric
attributes someone could
graph these it would call these methods.
I have changed these from attributes to explicit operations.
Thanks for catching this Raghu.
> Additional metrics & jmx beans and cleanup to use the recent metrics
> libraries
> -------------------------------------------------------------------------------
>
> Key: HADOOP-2645
> URL: https://issues.apache.org/jira/browse/HADOOP-2645
> Project: Hadoop
> Issue Type: Improvement
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Fix For: 0.16.0
>
> Attachments: metrics2.patch
>
>
> This patch does following:
> Data node :
> Additional metrics
> Cleunup old metrics to use recent metrics lib
> MBeans for data node metrics
> Namenode
> Cleunup old updates of metrics to use recent metrics lib
> Split Name none mbean to 2 MBeans - statistics and FSNamesystem status
> rename of name node mbean for consistency.
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