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From where comes all the listener threads? [message #663437]

Tue, 05 April 2011 01:06

Eclipse User

Hello,

we play around with the queue worker listener threads that receives messages from the internal queue and execute the workflow.

If we set the number of these threads to 0, there are several QueueWorker-Listener that remain alive. We don't know where these threads come from.

We have also noticed that we have more listener threads then we want to create. If we set the number of listener threads to 4 we have at least 10 additional queue worker listener threads. We evaluate this with VisualVM.

Have you an idea where the additional threads are created?

Re: From where comes all the listener threads? [message #663452 is a reply to message #663437]

Tue, 05 April 2011 03:22

Eclipse User

Originally posted by: juergen.schumacher.attensity.com

Good morning...

Am 05.04.2011, 07:06 Uhr, schrieb SMILANewBee <nils.thieme@unister.de>:
> Hello,
>
> we play around with the queue worker listener threads that receives
> messages from the internal queue and execute the workflow.
>
> If we set the number of these threads to 0, there are several
> QueueWorker-Listener that remain alive. We don't know where these
> threads come from.
>
> We have also noticed that we have more listener threads then we want to
> create. If we set the number of listener threads to 4 we have at least
> 10 additional queue worker listener threads. We evaluate this with
> VisualVM.
>
> Have you an idea where the additional threads are created?

No, I don't have an idea. I did a quick test in my dev environment and it
seems
to work as expected: If I set Threads="0" in all <Rule>s in
QueueWorkerListenerConfig.xml,
I don't get any "QueueWorker-Listener@..." threads at all, and with
Threads="1" I get
5 threads as there are 5 rules in the standard configuration. They even
adapt correctly
when I change the number of threads in the JMX console.

Where did you change the number of threads?

Cheers,
Juergen.

Re: From where comes all the listener threads? [message #663659 is a reply to message #663452]

Wed, 06 April 2011 02:06

Eclipse User

Good morning,

it was my fault. I have some listener rules in the config file. So the other rules adds some threads too.

Thanks for your hint.

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