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From Jess Holle <>
Subject Re: JConsole and tomcat.
Date Mon, 05 May 2008 03:40:50 GMT
I guess I'm doing something "funny" then because I see a *lot* of Tomcat 
MBeans in jconsole.

I added, of course -- to cover Java 5 and 
left it in place for Java 6, but otherwise I don't think I did anything 
funny until within my web app.

Costin Manolache wrote:
> This is a proposal for a very small change in tomcat trunk, to make tomcat
> easier to use with JConsole.
> Right now if you start tomcat 'out of box' and than try to inspect it with
> jconsole, you'll only see the 'platform' mbeans
> (memory etc). That's because tomcat doesn't use the platform mbean server.
> The fix is simple - in main or anywhere before the first
> MBeanServerFactory.findMBeanServer(null) we need
> to add a ManagementFactory.getPlatformMBeanServer(). This way modeler and
> tomcat will find the platform
> mbean server as the first server and use it. A better fix would be to
> replace all usages of findMBeanServer with
> getPlatformMBeanServer.
> The options are:
> - add a flag/system property to enable this behavior
> - make it default, add a flag to disable and use separate server
> - just use getPlatformMBeanServer with no flag.
> The javadoc is:
>   " It is recommended that this platform MBeanServer also be used
>     to register other application managed beans  besides the platform
> MXBeans.
>    This will allow all MBeans to be published through the same
>     MBeanServer and hence allow for easier network publishing
>     and discovery."
> I can't think of any good reason to use a separate MBean server - and using
> jconsole is quite nice, all
> other methods of remote JMX documented on our site are more complex ( but
> good for specific cases ).
> The extra benefit is that we can see both memory/logging/other platform
> mbeans in the same place with
> tomcat beans.
> Options ? Can I just add the one liner before the first invocation of
> MBeanServerFactory ?
> Costin

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