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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1722) Add support for exporting HBase metrics via JMX
Date Fri, 11 Sep 2009 22:23:57 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12754383#action_12754383
] 

stack commented on HBASE-1722:
------------------------------

Update: I committed patch added by Ryan to hbase-1687.  His patch was almost exactly the content
of hbase-bin.patch above.  My reasons for omitting hbase-bin.patch didn't hold up under scrutiny.
 The HBASE_HEAPSIZE appears before the HBASE_*_OPTS added by his patch (and by hbase-bin.patch)
and because the last -Xmx/-Xms wins, adding -Xmx/-Xms that override HBASE_HEAPSIZE works.

On commit of HBASE-1687, I amended the metrics.xml documentation to remove mention of HBASE_*_OPTS
addition now its no longer needed.

> Add support for exporting HBase metrics via JMX
> -----------------------------------------------
>
>                 Key: HBASE-1722
>                 URL: https://issues.apache.org/jira/browse/HBASE-1722
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: ipc, master, regionserver
>    Affects Versions: 0.19.3
>            Reporter: Gary Helmling
>            Priority: Minor
>             Fix For: 0.21.0
>
>         Attachments: hbase-bin.patch, jmx.patch, jmx_metrics-0.19.patch, jmx_support-trunk.patch,
metrics_docs_0.19.patch, metrics_docs_trunk.patch
>
>
> Current HBase metrics collection and reporting (for the 0.19 releases at least) doesn't
seem to export any of the metrics as MBeans via JMX.
> This patch adds JMX MBean support for reporting metrics collected in 3 areas:
> * org.apache.hadoop.hbase.ipc.HBaseRpcMetrics
> * org.apache.hadoop.hbase.master.metrics.MasterMetrics
> * org.apache.hadoop.hbase.regionserver.metrics.RegionServerMetrics
> This patch is only against the 0.19 branch, as the metrics API seems to have changed
a bit in Hadoop 0.20, including adding support for dynamic MBeans.  I'll add a patch reworked
for trunk shortly.

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