Re: Jetty/java processes not dieing?

It is probably the shutdown hook - it is a bit of a dodgey mechanism as it
looks like calling stop (and hence close on sockets) from a signal context
can cause JVMs some trouble.

It has often caused JVM crashes in the past and I have also seen some lockups.

The real solution is to implement a proper stop mechanism, so stop can
be called cleanly (then I'll have no excuses for a lockup :-)

I'll try to get a 'java -jar stop.jar' going that will work with our
start.jar.   If you have a Launcher, you may have to do something
similar yourself.

cheers

Chris Bailey wrote:> I'm seeing an intermittant problem that I'm wondering if 
anyone else has
> seen and has a solution to.  I'm using Jetty 4.2.3, running on Red Hat 7.2
> and 7.3 (Intel).  No JSP, servlet only.  Jetty min/max threads of 100/750.
> Sun JDK 1.4.1.  The problem is that the Java processes don't go away.  I
> have a small wrapper Java application that creates the Jetty instance, sets
> up the web app (we don't use a config file, it's done via code), etc.
> 
> The startup looks like (Launcher is the wrapper app, and I've omitted
> classpath for brevity):
> 
> nohup sh -c "exec java -server -Xms256m -Xmx512m -classpath ... Launcher >>
> /www/logs/jetty.log 2>&1" >/dev/null &
> echo $! > /www/logs/jetty.pid
> 
> The shutdown looks like (where $PID is the value from jetty.pid above):
> 
> kill $PID 2>/dev/null
> sleep 2
> kill -9 $PID 2>/dev/null
> 
> Much of the time it seems to work fine, but we've had several times where we
> do this, and the java process (and all it's threads) are still there.  Doing
> another manual kill -9 kills it.
> 
> Any ideas?
> 
> __
> Chris Bailey       mailto:chris@xxxxxxxxxxxxxxxxx
> Code Intensity     http://www.codeintensity.com
> 
> 
> 
> For the latest information about Jetty, please see http://jetty.mortbay.org
> 
>  
> 
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> 



-- 
Greg Wilkins<gregw@xxxxxxxxxxx>             Phone/fax: +44 7092063462
Mort Bay Consulting Australia and UK.          http://www.mortbay.com


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