Hi Tobias,

I am not sure if this helps a lot ;) Some links (clickable div containers, 
etc.) even do not work at all without internet connection and do not throw an 
exception.

Root cause:

java.lang.NullPointerException
     at tripplanner.mycompany.panels.VotingPanel$2.onSubmit(VotingPanel.java:51)
     at 
org.apache.wicket.ajax.markup.html.form.AjaxFallbackButton.onSubmit(AjaxFallbackButton.java:135)
     at org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1266)
     at org.apache.wicket.markup.html.form.Form.process(Form.java:938)
     at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:770)
     at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:703)
     at java.lang.reflect.Method.invoke(Method.java:483)
     at 
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
     at 
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216)
     at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:243)
     at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:236)
     at 
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:862)
     at 
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
     at 
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
     at 
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
     at 
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
     at 
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
     at 
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
     at 
org.apache.wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:159)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
     at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
     at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
     at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
     at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
     at 
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
     at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
     at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
     at 
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1081)
     at 
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
     at 
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
     at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
     at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
     at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
     at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
     at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
     at java.lang.Thread.run(Thread.java:745)

Complete stack:

org.apache.wicket.WicketRuntimeException: Method onFormSubmitted of interface 
org.apache.wicket.markup.html.form.IFormSubmitListener targeted at [Form 
[Component id = form]] on component [Form [Component id = form]] threw an 
exception
     at 
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:268)
     at 
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216)
     at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:243)
     at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:236)
     at 
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:862)
     at 
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
     at 
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
     at 
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
     at 
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
     at 
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)

java.lang.reflect.InvocationTargetException
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
     at java.lang.reflect.Method.invoke(Method.java:483)
     at 
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
     at 
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216)
     at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:243)
     at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:236)
     at 
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:862)
     at 
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
     at 
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
     at 
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
     at 
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
     at 
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)




> Am 16.02.2015 um 21:55 schrieb Tobias Soloschenko 
> <tobiassolosche...@googlemail.com>:
> 
> Hi,
> 
> please provide a StackTrace, so that we can see whats going on. :-)
> 
> Thank you.
> 
> kind regards
> 
> Tobias
> 
> Am 16.02.15 um 21:27 schrieb Chris:
>> Hi all,
>> 
>> When running a Wicket application, that is deployed locally on Tomcat, and 
>> Internet being turned off, Ajax is not working and I am getting null pointer 
>> exception when calling the target methods. With Internet being enabled, it 
>> works without problems.
>> 
>> What is the cause for this behaviour and how can I change the settings so 
>> that it works without Internet connection on the local Tomcat?
>> 
>> Thanks, Chris
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> 
> 
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