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From "Caldarale, Charles R" <Chuck.Caldar...@unisys.com>
Subject RE: controling resource and cpu hogging
Date Sun, 31 Dec 2006 13:22:55 GMT
> From: hanasaki [mailto:hanasaki@hanaden.com] 
> Subject: controling resource and cpu hogging
> 
> How can misbehaving deployed WAR's be identified and
> 1. killed off (maybe an issue if they hold onto threads
> or instance references when undeploy or stop is called)

You can try a profiler or thread dump to determine where each thread is
executing, but that's not a particularly easy or efficient way of
identifying the problem.  You can also use the built-in manager app to
see if threads are active in any given application.

> 2. be controlled (ie: throttle/cap a specific domain
> and/or WAR deployment in CPU consumption).

I'm not aware of anything currently in Tomcat or the JVM that will let
you do this easily.  However, JSR 284 (Resource Consumption Management
API - http://jcp.org/en/jsr/detail?id=284) has recently been approved,
which should address the issue.  No idea when anyone will actually
implement it.

 - Chuck


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