Hi,

Such kind of errors occur when you have several versions of Wicket in
the classpath.

2012/2/23 "André Schütz" <andre-p...@gmx.de>:
> Hello,
>
> I get the following error message during a start of the tomcat server with a 
> clean packed wicket application:
>
> /**
>  * BEGIN
>  */
>
> Exception in thread "Thread-2" java.lang.NoClassDefFoundError: 
> org/apache/wicket/ApplicationListenerCollection$2
>        at 
> org.apache.wicket.ApplicationListenerCollection.onBeforeDestroyed(ApplicationListenerCollection.java:44)
>        at org.apache.wicket.Application.internalDestroy(Application.java:639)
>        at 
> org.apache.wicket.protocol.http.WebApplication.internalDestroy(WebApplication.java:563)
>        at 
> org.apache.wicket.protocol.http.WicketFilter.destroy(WicketFilter.java:478)
>        at 
> org.apache.catalina.core.ApplicationFilterConfig.release(ApplicationFilterConfig.java:357)
>        at 
> org.apache.catalina.core.StandardContext.filterStop(StandardContext.java:3873)
>        at 
> org.apache.catalina.core.StandardContext.stop(StandardContext.java:4605)
>        at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1098)
>        at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1098)
>        at 
> org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
>        at 
> org.apache.catalina.core.StandardService.stop(StandardService.java:584)
>        at 
> org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)
>        at org.apache.catalina.startup.Catalina.stop(Catalina.java:643)
>        at 
> org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:687)
> Caused by: java.lang.ClassNotFoundException: 
> org.apache.wicket.ApplicationListenerCollection$2
>        at 
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1484)
>        at 
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1329)
>        ... 14 more
>
> /**
>  * END
>  */
>
> Any ideas about this error?
>
> Thanks,
> Andre
> --
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-- 
Martin Grigorov
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Training, Consulting, Development
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