Exception thrown when refreshing the page.

Hi,

i have a form which as few text field elements. and when i submit the form
it works fine. but after submit if i go and refresh the page it gives me an
expception.

my java and html code is below.

TextField<String>firstName = new TextField("firstName", false, 50);
firstName.setOutputMarkupId(true);
fragment.add(firstName);
fragment.add(new Label(firstName.getId() +
".feedback").setOutputMarkupId(true));

<wicket:fragment wicket:id="fragment">
<label for="firstName">First
Name</label>
<input id="firstName"
wicket:id="firstName" type="text" value="{firstName}" maxlength="50"
tabindex="1" />

</wicket:fragment>

and here's the exception i'm getting.

org.apache.wicket.WicketRuntimeException: Exception in rendering component:
[Component id = firstName.feedback]
at org.apache.wicket.Component.internalRenderComponent(Component.java:2578)
at
org.apache.wicket.markup.html.WebComponent.onRender(WebComponent.java:56)
at org.apache.wicket.Component.internalRender(Component.java:2381)
at org.apache.wicket.Component.render(Component.java:2309)
at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1390)
at org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1555)
at
org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1530)
at
org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1485)
at
org.apache.wicket.markup.html.panel.FragmentMarkupSourcingStrategy.onComponentTagBody(FragmentMarkupSourcingStrategy.java:86)
at org.apache.wicket.Component.internalRenderComponent(Component.java:2551)
at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1494)
at org.apache.wicket.Component.internalRender(Component.java:2381)
at org.apache.wicket.Component.render(Component.java:2309)
at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1390)
at org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1555)
at
org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1530)
at
org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1485)
at
org.apache.wicket.markup.html.form.Form.onComponentTagBody(Form.java:1696)
at
org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:71)
at org.apache.wicket.Component.internalRenderComponent(Component.java:2551)
at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1494)
at org.apache.wicket.Component.internalRender(Component.java:2381)
at org.apache.wicket.Component.render(Component.java:2309)
at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1390)
at org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1555)
at org.apache.wicket.Page.onRender(Page.java:887)
at org.apache.wicket.markup.html.WebPage.onRender(WebPage.java:142)
at org.apache.wicket.Component.internalRender(Component.java:2381)
at org.apache.wicket.Component.render(Component.java:2309)
at org.apache.wicket.Page.renderPage(Page.java:1024)
at
org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:121)
at
org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:219)
at
org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:175)
at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:862)
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
at
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.fanminder.HibernateFilter.doFilter(HibernateFilter.java:24)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.RuntimeException: An error occurred while getting the
model object for Component: [Component id = firstName.feedback, page =
com.fanminder.merchant.app.fans.signup.FanSignUpPage, path =
26:webSignUpForm:firstNamePnl:firstName.feedback.Label, isVisible = true,
isVersioned = true, markup = [markup =
file:/home/Projects/project/source/rebrand_new/new-project/merchant-frontend/target/project-frontend-2.0-SNAPSHOT/WEB-INF/classes/com/merchant/app/fans/signup/FanSignUpPage.html
, index = 0, current = '' (line 0, column 0)]]
at org.apache.wicket.Component.getDefaultModelObject(Component.java:1632)
at
org.apache.wicket.Component.getDefaultModelObjectAsString(Component.java:1655)
at
org.apache.wicket.markup.html.basic.Label.onComponentTagBody(Label.java:131)
at
org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:71)
at org.apache.wicket.Component.internalRenderComponent(Component.java:2551)
... 59 more
Caused by: org.apache.wicket.WicketRuntimeException: No get method defined
for class: class java.lang.String expression: feedback
at
org.apache.wicket.core.util.lang.PropertyResolver.getGetAndSetter(PropertyResolver.java:502)
at
org.apache.wicket.core.util.lang.PropertyResolver.getObjectAndGetSetter(PropertyResolver.java:344)
at
org.apache.wicket.core.util.lang.PropertyResolver.getObjectAndGetSetter(PropertyResolver.java:247)
at
org.apache.wicket.core.util.lang.PropertyResolver.getValue(PropertyResolver.java:97)
at
org.apache.wicket.model.AbstractPropertyModel.getObject(AbstractPropertyModel.java:86)
at org.apache.wicket.Component.getDefaultModelObject(Component.java:1627)
... 63 more