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https://issues.apache.org/jira/browse/LOG4J2-500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13889525#comment-13889525
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Remko Popma commented on LOG4J2-500:
------------------------------------
This is still in progress, but I've made the following changes in revisions
1563745 and 1563911:
*ObjectName changes*
{color:red}(NEW JMX ObjectNames ARE INCOMPATIBLE WITH BETA-9 AND OLDER
VERSIONS){color}
* Appenders: {{org.apache.logging.log4j2:type=%s,component=Appenders,name=%s}}
* Async Appenders:
{{org.apache.logging.log4j2:type=%s,component=AsyncAppenders,name=%s}}
* ContextSelector:
{{org.apache.logging.log4j2:type=%s,component=ContextSelector}}
* LoggerConfigs: {{org.apache.logging.log4j2:type=%s,component=Loggers,name=%s}}
* LoggerContext: {{org.apache.logging.log4j2:type=%s}}
* RingBuffer for all loggers async:
{{org.apache.logging.log4j2:type=%s,component=AsyncLoggerRingBuffer}}
* RingBuffer for mixed sync/async:
{{org.apache.logging.log4j2:type=%s,component=Loggers,name=%s,subtype=RingBuffer}}
* StatusLogger: {{org.apache.logging.log4j2:type=%s,component=StatusLogger}}
(In case you wonder why these ObjectNames have {{type=LoggerContextName}} and
not {{name=LoggerContextName}}. JConsole will assume that every {{ObjectName}}
has a {{type}} property and will prioritize the {{type}} property when building
the navigation tree. Google "JMX Best Practices" for details.)
*JMX Client GUI*
* Now has a tab for each active LoggerContext
* Each LoggerContext tab is itself a tabbed pane with a LoggerStatus tab and a
configuration editor tab
* Updated screenshots in JMX Client GUI manual page
*Granular Unloading*
LoggerContext will now only unregister its own MBeans when stopped (unloading a
webapp only unregisters the MBeans for that webapp)
*TODO*
* Test with web application (multiple active contexts, loading/unloading)
* Document somewhere that the MBean ObjectNames are changing with this release
* (Optional) Add screenshots with multiple active Logger Contexts
* (Optional) Dynamically update client GUI when a web application is loaded and
MBeans are registered (or unloaded and MBeans are unregistered)
> Unloading one webapp unloads JMX MBeans for all webapps
> -------------------------------------------------------
>
> Key: LOG4J2-500
> URL: https://issues.apache.org/jira/browse/LOG4J2-500
> Project: Log4j 2
> Issue Type: Bug
> Components: JMX
> Affects Versions: 2.0-rc1
> Reporter: Remko Popma
> Assignee: Remko Popma
>
> As a stopgap solution for LOG4J2-406, all MBeans are unregistered when a
> LoggerContext is stopped.
> In an application server, multiple web applications can be deployed and
> undeployed independently and a better solution would only unregister the
> MBeans associated with the web application that is being undeployed.
> Current MBean ObjectNames look like this (simplified):
> {code}
> ...StatusLogger
> ...ContextSelector
> ...LoggerContext,ctx=%s
> ...LoggerConfig,ctx=%s,name=%s
> ...Appender,ctx=%s,name=%s
> ...
> {code}
> Assuming that every web application has a unique name, and this name becomes
> the name of the LoggerContext, then one solution would be to create
> StatusLogger and ContextSelector MBeans that have the LoggerContext name in
> their ObjectName:
> {code}
> ...StatusLogger,ctx=%s
> ...ContextSelector,ctx=%s
> ...LoggerContext,ctx=%s
> ...LoggerConfig,ctx=%s,name=%s
> ...Appender,ctx=%s,name=%s
> ...
> {code}
> This way, every web application would have its own StatusLogger and
> ContextSelector MBeans. The MBeans may point to the same (shared) underlying
> StatusLogger and ContextSelector objects. When a web application is
> undeployed, unregistering all MBeans associated with the LoggerContext will
> not affect any MBeans associated with another web application (which has it
> own, separate, LoggerContext).
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