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https://issues.apache.org/jira/browse/HBASE-10436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13906736#comment-13906736
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Elliott Clark commented on HBASE-10436:
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+1 hbase-10436.notbean.patch
> hbase 0.96+ jmx does not have regionserver info any more.
> ---------------------------------------------------------
>
> Key: HBASE-10436
> URL: https://issues.apache.org/jira/browse/HBASE-10436
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.0, 0.96.0, 0.99.0
> Reporter: Jonathan Hsieh
> Assignee: Jonathan Hsieh
> Priority: Critical
> Attachments: hbase-10436.notbean.patch, hbase-10436.patch,
> hbase-10436.v2.patch
>
>
> HBase 0.96's refactored jmx beans do not contain the master's list of dead
> region servers and live regionservers with load info. HBase 0.94 did (though
> in a single monolithic blob).
> This JMX interface should be considered as much of an API as the the normal
> wire or java api. Dropping values from this was done without deprecation and
> the removal of this information is a functional regression.
> We should provide the information in the 0.96+ JMX. HBase 0.94 had a
> monolithic JMX blob ("hadoop:service=Master,name=Master") that contained a
> lot of information, including the regionserver list and the cached
> regionserver load for each region found on the master webpage. 0.96+
> refactored jmx this into several jmx beans which could be selectively
> retrieved. These include:
> * hadoop:service=HBase,name=Master,sub=AssignmentManager
> * hadoop:service=HBase,name=Master,sub=Balancer
> * hadoop:service=HBase,name=Master,sub=Server
> * hadoop:service=HBase,name=Master,sub=FileSystem
> Specifically the (Hadoop:service=HBase,name=Master,sub=Server) listing that
> used to contain regionservers and deadregionservers in jmx were replaced in
> with numRegionServers and numDeadRegionservers which only contain counts.
> I propose just adding another mbean called "RegionServers" under the bean:
> "hadoop:service=HBase,name=Master,sub=RegionServers"
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