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https://issues.apache.org/jira/browse/HADOOP-2398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12553523
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Raghu Angadi commented on HADOOP-2398:
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A few comments :
# Remove LOG.debug() after inovke() in RPC.java
# rpcDiscardedOps is not treated/named consistently compared to other two
variables in RpcMetrics and RpcMgt. Also is is is not updated or reset.
# RpcMetrics.log should be called LOG.
# As you mention in the conversation, right now RpcMgtMBean interfaces and the
access methods in RpcMgt are quired by JMX. Once we move "Dyncalic MBean" stuff
most of it will go away. Same for NameNodeMgt and NameNodeMBean.
registerMBean() could be in units.
# createFile() etc in NameNodeMetrics don't need to be synchronized.
> 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, 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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