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From "Tanping Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2203) Add additional fields to the JMX output on NameNode
Date Tue, 26 Jul 2011 19:05:11 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13071287#comment-13071287
] 

Tanping Wang commented on HDFS-2203:
------------------------------------

I just checked out HDFS source and did a build on my local box.  I am able to see "BlocksTotal"
and "CapacityTotal" attributes from the bean named, "Hadoop:service=NameNode,name=FSNamesystemState"
:

{noformat}
{
"name" : "Hadoop:service=NameNode,name=FSNamesystemState",
"modelerType" : "org.apache.hadoop.hdfs.server.namenode.FSNamesystem",
"CapacityTotal" : 152897236992,
"CapacityUsed" : 24576,
"CapacityRemaining" : 69198626816,
"TotalLoad" : 1,
"BlocksTotal" : 0,
"FilesTotal" : 1,
"PendingReplicationBlocks" : 0,
"UnderReplicatedBlocks" : 0,
"ScheduledReplicationBlocks" : 0,
"FSState" : "Operational",
"NumLiveDataNodes" : 1,
"NumDeadDataNodes" : 0
},
{noformat}

As far as I remebered, the JMXJsonServlet was checked into trunk.  So it should be available
to 0.23. release.

> Add additional fields to the JMX output on NameNode
> ---------------------------------------------------
>
>                 Key: HDFS-2203
>                 URL: https://issues.apache.org/jira/browse/HDFS-2203
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.20.204.0, 0.20.205.0, 0.23.0
>            Reporter: Charles Wimmer
>            Priority: Minor
>              Labels: newbie
>
> When accessing the JMX data via http (http://namenode:50070/jmx) there are a couple of
useful fields missing from this bean:
> "name" : "Hadoop:service=NameNode,name=NameNodeInfo",
> "modelerType" : "org.apache.hadoop.hdfs.server.namenode.FSNamesystem",
> Please add the number of blocks and the configured capacity. 

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