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From "Elek, Marton (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (HADOOP-15339) Support additional key/value propereties in JMX bean registration
Date Mon, 29 Oct 2018 12:20:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Elek, Marton reopened HADOOP-15339:

Since the commit we use this change from ozone/hdds and it worked well.

This change is required to have a working ozone/hdds webui as the shared code path tags the
common jmx beans with generic key/value tags.

I reopen this issue and propose to backport it to branch-3.1 to make it easier to use hdds/ozone
with older hadoop versions.
 # It's a small change
 # Backward compatible
 # Safe to use (no issue during the last 6 months)
 # No conflicts for cherry-pick.


> Support additional key/value propereties in JMX bean registration
> -----------------------------------------------------------------
>                 Key: HADOOP-15339
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15339
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: common
>            Reporter: Elek, Marton
>            Assignee: Elek, Marton
>            Priority: Major
>             Fix For: 3.2.0
>         Attachments: HADOOP-15339.001.patch, HADOOP-15339.002.patch, HADOOP-15339.003.patch
> org.apache.hadoop.metrics2.util.MBeans.register is a utility function to register objects
to the JMX registry with a given name prefix and name.
> JMX supports any additional key value pairs which could be part the the address of the
jmx bean. For example: _java.lang:type=MemoryManager,name=CodeCacheManager_
> Using this method we can query a group of mbeans, for example we can add the same tag
to similar mbeans from namenode and datanode.
> This patch adds a small modification to support custom key value pairs and also introduce
a new unit test for MBeans utility which was missing until now.

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