NoClassDefFoundError with DatePicker on app reload

[Sébastien Piller]

Hello, I've a problem with the DatePicker component. Every time I reload my application (in Eclipse -> Run -> 'My project' on MyEclipse Tomcat, or with an application undeploy/redeploy on Tomcat), I got the stacktrace below. java.lang.NoClassDefFoundError: org.apache.wicket.extensions.yui.calendar.DatePicker     at booby.dbadmin.people.FormPerson.(FormPerson.java:174)     at cosimoo.wizardorderprocess.WizardOrderProcess$Address.(WizardOrderProcess.java:90)     at cosimoo.wizardorderprocess.WizardOrderProcess.(WizardOrderProcess.java:693)     at cosimoo.PagePassOrderOrCustomizeNewProduct$1.onClick(PagePassOrderOrCustomizeNewProduct.java:21)     at org.apache.wicket.markup.html.link.Link.onLinkClicked(Link.java:214)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)     at java.lang.reflect.Method.invoke(Unknown Source)     at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:183)     at org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:73)     at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:90)     at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1166)     at org.apache.wicket.RequestCycle.step(RequestCycle.java:1241)     at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1316)     at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)     at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:354)     at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:194)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)     at java.lang.Thread.run(Unknown Source) However, I'm sure that class is in my path... I can see it under /libs/wicket-extensions-1.3.1.jar. And if I make a clean start (ie stop tomcat, manually clean the webapps folder, restart tomcat and copy my file.war), then everything works fine. Is it a classloader issue or something like that? How to avoid this? --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]