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From Peter Lin <>
Subject Re: Analysing dead threads
Date Mon, 15 Nov 2004 13:53:56 GMT
just for clarification. Do you mean zombie threads?  Threads that are
not reachable, but still running.  My advice would be to download a
profiler and figure out the cause.


On Mon, 15 Nov 2004 14:42:14 +0100, Steffen Heil <> wrote:
> Hi
> I have a situation, where a lot of threads seem to stop working right in my
> servlet.
> From debug output, I know they entered the servlet but never leave it.
> My problem is that this never occurs on our development system, but only on
> the production system.
> I need to stop tomcat end even do a "killall -9 java" to get everything to
> stop. Then I restart tomcat.
> But I don't know what happened.
> I know there is a way to kill the JVM, so that I see the stack trace of kill
> threads.
> How can I do it?
> (Is there another way to see what those threads are waiting for?)
> Regards,
>   Steffen

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