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Posted to java-user@axis.apache.org by Jochen Zink <jo...@web.de> on 2007/07/18 15:14:59 UTC
[Axis2] ConcurrentModificationException on Statefull WebService
Hello,
I'm using Axis2 1.1.1 with WS-Addressing module engaged.
I have a statefull Webservice (scope="sopasession") which receives binary Documents from clients.
At the moment I try to build a stress test with JMeter. 100 clients are calling the service. Some calls fails with the following message:
ERROR [AxisServlet] java.util.ConcurrentModificationException
There is no StackTrace or ErrorMessage included. I figured out, that this Exception is cached on line 285 of AxisServlet class. But I don't know where the problem is. I'm pretty sure, that this Exception does not come from my ServiceClass. I surround every javaCode with try {...} catch(Exception e) and inside the ServiceClass is nothing which can be accessed from different threads. No static content or something else.
I figured out, that the problem mostly happened, after axis destroys a service instance (or a couple of service instances)
1. Service clients calls the service
2. The configured timeout of service lifetime runs out, for some clients
3. Another(!) clients calls the service. -> ConcurrentModificationException
Only in Stress Situations (ca 100 clients) some ServiceCalls end up with a ConcurrentModificationException happens.
Is there any problem known?
I just find two JIRA entry's, but I'm not sure if these entries pointing to my problem:
http://issues.apache.org/jira/browse/AXIS2-2662
http://issues.apache.org/jira/browse/AXIS2-1053
Thanks a lot!
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Re: [Axis2] ConcurrentModificationException on Statefull WebService
Posted by Michele Mazzucco <Mi...@ncl.ac.uk>.
Dims,
yes, you worked around JIRA 1053 (see the comments on the bug page), but
that problem was on the client side -- this is on the server side.
Michele
On Wed, 2007-07-18 at 09:23 -0400, Davanum Srinivas wrote:
> Jochen,
>
> Please try a nightly build. I remember fixing at least one of these
> Concurrent Exception
>
> thanks,
> dims
>
> On 7/18/07, Jochen Zink <jo...@web.de> wrote:
> > Hello,
> >
> > I'm using Axis2 1.1.1 with WS-Addressing module engaged.
> >
> > I have a statefull Webservice (scope="sopasession") which receives binary Documents from clients.
> >
> > At the moment I try to build a stress test with JMeter. 100 clients are calling the service. Some calls fails with the following message:
> > ERROR [AxisServlet] java.util.ConcurrentModificationException
> >
> > There is no StackTrace or ErrorMessage included. I figured out, that this Exception is cached on line 285 of AxisServlet class. But I don't know where the problem is. I'm pretty sure, that this Exception does not come from my ServiceClass. I surround every javaCode with try {...} catch(Exception e) and inside the ServiceClass is nothing which can be accessed from different threads. No static content or something else.
> >
> > I figured out, that the problem mostly happened, after axis destroys a service instance (or a couple of service instances)
> >
> > 1. Service clients calls the service
> > 2. The configured timeout of service lifetime runs out, for some clients
> > 3. Another(!) clients calls the service. -> ConcurrentModificationException
> >
> > Only in Stress Situations (ca 100 clients) some ServiceCalls end up with a ConcurrentModificationException happens.
> >
> > Is there any problem known?
> >
> > I just find two JIRA entry's, but I'm not sure if these entries pointing to my problem:
> > http://issues.apache.org/jira/browse/AXIS2-2662
> > http://issues.apache.org/jira/browse/AXIS2-1053
> >
> > Thanks a lot!
> >
> > _______________________________________________________________________
> > Jetzt neu! Schuetzen Sie Ihren PC mit McAfee und WEB.DE. 3 Monate
> > kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=022220
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: axis-user-unsubscribe@ws.apache.org
> > For additional commands, e-mail: axis-user-help@ws.apache.org
> >
> >
>
>
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Re: [Axis2] ConcurrentModificationException on Statefull WebService
Posted by Davanum Srinivas <da...@gmail.com>.
Jochen,
Please try a nightly build. I remember fixing at least one of these
Concurrent Exception
thanks,
dims
On 7/18/07, Jochen Zink <jo...@web.de> wrote:
> Hello,
>
> I'm using Axis2 1.1.1 with WS-Addressing module engaged.
>
> I have a statefull Webservice (scope="sopasession") which receives binary Documents from clients.
>
> At the moment I try to build a stress test with JMeter. 100 clients are calling the service. Some calls fails with the following message:
> ERROR [AxisServlet] java.util.ConcurrentModificationException
>
> There is no StackTrace or ErrorMessage included. I figured out, that this Exception is cached on line 285 of AxisServlet class. But I don't know where the problem is. I'm pretty sure, that this Exception does not come from my ServiceClass. I surround every javaCode with try {...} catch(Exception e) and inside the ServiceClass is nothing which can be accessed from different threads. No static content or something else.
>
> I figured out, that the problem mostly happened, after axis destroys a service instance (or a couple of service instances)
>
> 1. Service clients calls the service
> 2. The configured timeout of service lifetime runs out, for some clients
> 3. Another(!) clients calls the service. -> ConcurrentModificationException
>
> Only in Stress Situations (ca 100 clients) some ServiceCalls end up with a ConcurrentModificationException happens.
>
> Is there any problem known?
>
> I just find two JIRA entry's, but I'm not sure if these entries pointing to my problem:
> http://issues.apache.org/jira/browse/AXIS2-2662
> http://issues.apache.org/jira/browse/AXIS2-1053
>
> Thanks a lot!
>
> _______________________________________________________________________
> Jetzt neu! Schuetzen Sie Ihren PC mit McAfee und WEB.DE. 3 Monate
> kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=022220
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: axis-user-unsubscribe@ws.apache.org
> For additional commands, e-mail: axis-user-help@ws.apache.org
>
>
--
Davanum Srinivas :: http://davanum.wordpress.com
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