Can i have some brief explanation on what could have possibly caused this to
happen?
WicketMessage: Error attaching this container for rendering: [MarkupContainer
[Component id = subtree]]
Root cause:
java.lang.NullPointerException
at wickettree.nested.Subtree$ModelIterator.<init>(Subtree.java:133)
at wickettree.nested.Subtree$1.getItemModels(Subtree.java:75)
at
org.apache.wicket.markup.repeater.RefreshingView.onPopulate(RefreshingView.java:94)
at
org.apache.wicket.markup.repeater.AbstractRepeater.onBeforeRender(AbstractRepeater.java:131)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1061)
at org.apache.wicket.Component.beforeRender(Component.java:1095)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1751)
at org.apache.wicket.Component.onBeforeRender(Component.java:3863)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1061)
at org.apache.wicket.Component.beforeRender(Component.java:1095)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1751)
at org.apache.wicket.Component.onBeforeRender(Component.java:3863)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1061)
at org.apache.wicket.Component.beforeRender(Component.java:1095)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1751)
at org.apache.wicket.Component.onBeforeRender(Component.java:3863)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1061)
at org.apache.wicket.Component.beforeRender(Component.java:1095)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1751)
at org.apache.wicket.Component.onBeforeRender(Component.java:3863)
at org.apache.wicket.Page.onBeforeRender(Page.java:1501)
at
com.is.web.sam.role.BaseRoleManagementPage.onBeforeRender(BaseRoleManagementPage.java:239)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1061)
at org.apache.wicket.Component.beforeRender(Component.java:1095)
at org.apache.wicket.Component.prepareForRender(Component.java:2232)
at org.apache.wicket.Component.prepareForRender(Component.java:2269)
at org.apache.wicket.Page.renderPage(Page.java:893)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.respond(BookmarkablePageRequestTarget.java:262)
at
org.apache.wicket.request.AbstractRequestCycleProcessor.respond(AbstractRequestCycleProcessor.java:105)
at
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1258)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1428)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:456)
at com.is.java.common.util.MySecureFilter.doGet(MySecureFilter.java:127)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:289)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
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.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:595)
Complete stack:
org.apache.wicket.WicketRuntimeException: Error attaching this container for
rendering: [MarkupContainer [Component id = subtree]]
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1763)
at org.apache.wicket.Component.onBeforeRender(Component.java:3863)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1061)
at org.apache.wicket.Component.beforeRender(Component.java:1095)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1751)
at org.apache.wicket.Component.onBeforeRender(Component.java:3863)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1061)
at org.apache.wicket.Component.beforeRender(Component.java:1095)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1751)
at org.apache.wicket.Component.onBeforeRender(Component.java:3863)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1061)
at org.apache.wicket.Component.beforeRender(Component.java:1095)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1751)
at org.apache.wicket.Component.onBeforeRender(Component.java:3863)
at org.apache.wicket.Page.onBeforeRender(Page.java:1501)
at
com.is.web.sam.role.BaseRoleManagementPage.onBeforeRender(BaseRoleManagementPage.java:239)
at org.apache.wicket.Component.internalBeforeRender(Component.java:1061)
at org.apache.wicket.Component.beforeRender(Component.java:1095)
at org.apache.wicket.Component.prepareForRender(Component.java:2232)
at org.apache.wicket.Component.prepareForRender(Component.java:2269)
at org.apache.wicket.Page.renderPage(Page.java:893)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.respond(BookmarkablePageRequestTarget.java:262)
at
org.apache.wicket.request.AbstractRequestCycleProcessor.respond(AbstractRequestCycleProcessor.java:105)
at
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1258)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1428)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:456)
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