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From David kerber <>
Subject Monitoring multiple tomcat instances from single app
Date Tue, 09 Apr 2013 19:18:22 GMT
My system has several instances of TC 7.0.22, running on windows server 
2008 R2, and JRE 6.0.27.  And yes, I know both TC and Java could use an 

The TC instances are all running the same webapp, as a Windows service, 
though not all have the exact same version of the webapp.  Each is 
running from its own catalina.base directory, but all have the same 
catalina.home.  Each instance is listening on a different TCP port, and 
everything is working fine, handling several hundred requests per second.

What I'd like to do is develop an easier way of monitoring each instance 
than what I have now.  In particular, I'd like to get visibility to a 
couple of the webapp's internal variables (they're counters), as well as 
being able to stop and restart the instances if necessary.  My current 
method is that the app has a browser page that I can log into and see 
the variables of interest, and I use tomcat7w to control the service 
instances.  Of course, that requires me to log into each one of them 
individually to check on them.  That requirement for separate logins is 
what I'd like to eliminate if possible.

Is this even remotely doable from (ideally) another webapp running on 
the same server, or maybe an external non-browser app?  Or am I just 
dreaming?  Can JMX allow me to see internal application variables and 
control services?

Thanks for any suggestions!

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