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https://issues.apache.org/jira/browse/HADOOP-2398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12555413#action_12555413
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Raghu Angadi commented on HADOOP-2398:
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+1.
You might want to move all the 'HADOOP_OPTS="-Dcom.sun.management.jmxremote
$HADOOP_OPTS' into one if clause in bin/hadoop, which is functionally same. But
this is more of a personal preference.
> Additional Instrumentation for NameNode, RPC Layer and JMX support
> -------------------------------------------------------------------
>
> Key: HADOOP-2398
> URL: https://issues.apache.org/jira/browse/HADOOP-2398
> Project: Hadoop
> Issue Type: New Feature
> Components: dfs
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Fix For: 0.16.0
>
> Attachments: metricsPatch6.txt, metricsPatch6_1.txt,
> ScreenShotNameNodeStats.png, ScreenShotRPCStats.png
>
>
> Additional Instrumentation is needed for name node and its rpc layer.
> Furthermore the instrumentation should be
> visible via JMX, Java's standard monitoring tool.
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