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From Renato Weiner <rewei...@yahoo.com>
Subject RE: Killing endless loop servlet - howto ? killing JVM or unload class ?
Date Mon, 02 Jul 2001 14:30:40 GMT

> OK, no one's answered this yet, so,...

>> First, I don't know if it's killing a thread is the right approach. Should I do that,
without shutdown Tomcat ? 

> So, why are you creating an infinite loop? I mean, if you didn't, you wouldn't have to
kill it.

The problem is my environment. Since this is a webhosting, I cannot control what my users
do. I'm 100% sure that they will create code that will run forever. I need to find a way to
avoid this.

> If you're generally asking how one can kill threads in Java, you could use java.lang.Thread.stop()
(but read the deprecation warning). But as a rule, not creating infinite loops is a much better
strategy.

>> Is there a way to set a 'time-out' for a Servlet ?

> Not the way you mean. You can set a timeout for a session (by modifying your web.xml);
but AFAIK, the only way to set a timeout for a request would be on your browser.

What about a patch for PoolTcpConnector ? Anyone ?

Thanks !
-----Original Message-----
From: Renato Weiner [mailto:reweiner@yahoo.com]
Sent: Monday, July 02, 2001 6:03 AM
To: tomcat-user@jakarta.apache.org
Subject: Killing endless loop servlet - howto ? killing JVM or unload class
?


Hi all, 
I'm rolling out a successful Tomcat instalation in a shared environment (
it's a great software ! ). But I have a concern. 
I created a servlet that loops forever ( a very stupid one, by the way ).
When I executed it, it allocates a Tomcat thread and it just runs forever.
If I try to kill it after it consumed, let's say, 30 seconds of processing,
it ended up killing the whole JVM. 
First, I don't know if it's killing a thread is the right approach. Should I
do that, without shutdown Tomcat ? Is there a way to set a 'time-out' for a
Servlet ? What I can doin this situation ? Is there an Interceptor that can
unload this class somehow ? 
Thanks in advance 
Renato - Brazil 
P.S. I'm running Linux, kernel 2.4.3, Tomcat 3.2.2




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