Hi. Well in my case this error apeared when the user clicked on a link that was directing the user to the next page, and while the user did not wait for the other page to load, or he thought that he did not press the mouse button and he clicked again. The server saw that the component(link) was no longer in the the new page and therefore the nullpointer. I got around this by disabling the link after the clicking.
salmas wrote: > > Every once in awhile if I am clicking around for awhile in the UI of my > application I get the following error. What causes this? > > java.lang.NullPointerException > at > wicket.request.compound.DefaultRequestTargetResolverStrategy.resolveListenerInterfaceTarget(DefaultRequestTargetResolverStrategy.java:295) > at > wicket.request.compound.DefaultRequestTargetResolverStrategy.resolveRenderedPage(DefaultRequestTargetResolverStrategy.java:228) > at > wicket.request.compound.DefaultRequestTargetResolverStrategy.resolve(DefaultRequestTargetResolverStrategy.java:153) > at > wicket.request.compound.AbstractCompoundRequestCycleProcessor.resolve(AbstractCompoundRequestCycleProcessor.java:48) > at wicket.RequestCycle.step(RequestCycle.java:992) > at wicket.RequestCycle.steps(RequestCycle.java:1084) > at wicket.RequestCycle.request(RequestCycle.java:454) > at wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:219) > at wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:262) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) > at > weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1072) > at > weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:465) > at > weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:348) > at > weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6981) > at > weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) > at > weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) > at > weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3892) > at > weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2766) > at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224) > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183) > -- View this message in context: http://www.nabble.com/Why-dioes-this-error-occur--tf4766684.html#a13634076 Sent from the Wicket - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
