Details
Minor Description
After redeploying by simpling pasting the new war in the webapps folder, I could 2/3 clicks and then I would get the NPE shown under. Note that I could reproduce this bug just by redoing the clicks pattern. I then restarted resin and then tried to hot deploy once again, but the issue didn't reappear.
Here is the stack trace :
Unexpected RuntimeException
WicketMessage: Exception in rendering component: [MarkupContainer [Component id = _header_30]]
Root cause:
java.lang.NullPointerException
at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
at org.apache.wicket.markup.MarkupCache$DefaultCacheImplementation.get(MarkupCache.java:744)
at org.apache.wicket.markup.MarkupCache.removeMarkup(MarkupCache.java:131)
at org.apache.wicket.markup.MarkupCache.loadMarkup(MarkupCache.java:491)
at org.apache.wicket.markup.MarkupCache.loadMarkupAndWatchForChanges(MarkupCache.java:559)
at org.apache.wicket.markup.MarkupCache.getMarkup(MarkupCache.java:325)
at org.apache.wicket.markup.MarkupCache.getMarkupStream(MarkupCache.java:216)
at org.apache.wicket.MarkupContainer.getAssociatedMarkupStream(MarkupContainer.java:351)
at org.apache.wicket.markup.html.ContainerWithAssociatedMarkupHelper.renderHeadFromAssociatedMarkupFile(ContainerWithAssociatedMarkupHelper.java:72)
at org.apache.wicket.markup.html.WebMarkupContainerWithAssociatedMarkup.renderHeadFromAssociatedMarkupFile(WebMarkupContainerWithAssociatedMarkup.java:73)
at org.apache.wicket.markup.html.panel.Panel.renderHead(Panel.java:137)
at org.apache.wicket.markup.html.internal.HtmlHeaderContainer$1.component(HtmlHeaderContainer.java:231)
at org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:878)
at org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:893)
at org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:893)
at org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:893)
at org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:918)
at org.apache.wicket.markup.html.internal.HtmlHeaderContainer.renderHeaderSections(HtmlHeaderContainer.java:222)
at org.apache.wicket.markup.html.internal.HtmlHeaderContainer.onComponentTagBody(HtmlHeaderContainer.java:137)
at org.apache.wicket.Component.renderComponent(Component.java:2626)
at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1536)
at org.apache.wicket.Component.render(Component.java:2457)
at org.apache.wicket.MarkupContainer.autoAdd(MarkupContainer.java:229)
at org.apache.wicket.markup.resolver.HtmlHeaderResolver.resolve(HtmlHeaderResolver.java:80)
at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1441)
at org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1552)
at org.apache.wicket.Page.onRender(Page.java:1545)
at org.apache.wicket.Component.render(Component.java:2457)
at org.apache.wicket.Page.renderPage(Page.java:914)
at org.apache.wicket.protocol.http.WebRequestCycle.redirectTo(WebRequestCycle.java:166)
at org.apache.wicket.request.target.component.PageRequestTarget.respond(PageRequestTarget.java:58)
at org.apache.wicket.request.AbstractRequestCycleProcessor.respond(AbstractRequestCycleProcessor.java:105)
at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1249)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1320)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1419)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:456)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:289)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
at org.codesmell.jpsak.servlet.EntityManagerFilter.doFilter(EntityManagerFilter.java:40)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:189)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:266)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:292)
at com.caucho.server.port.TcpConnection.handleRequests(TcpConnection.java:577)
at com.caucho.server.port.TcpConnection$AcceptTask.doAccept(TcpConnection.java:1211)
at com.caucho.server.port.TcpConnection$AcceptTask.run(TcpConnection.java:1152)
at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:759)
at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:681)
at java.lang.Thread.run(Thread.java:619)
Complete stack:
org.apache.wicket.WicketRuntimeException: Exception in rendering component: [MarkupContainer [Component id = _header_30]]
at org.apache.wicket.Component.renderComponent(Component.java:2665)
at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1536)
at org.apache.wicket.Component.render(Component.java:2457)
at org.apache.wicket.MarkupContainer.autoAdd(MarkupContainer.java:229)
at org.apache.wicket.markup.resolver.HtmlHeaderResolver.resolve(HtmlHeaderResolver.java:80)
at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1441)
at org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1552)
at org.apache.wicket.Page.onRender(Page.java:1545)
at org.apache.wicket.Component.render(Component.java:2457)
at org.apache.wicket.Page.renderPage(Page.java:914)
at org.apache.wicket.protocol.http.WebRequestCycle.redirectTo(WebRequestCycle.java:166)
at org.apache.wicket.request.target.component.PageRequestTarget.respond(PageRequestTarget.java:58)
at org.apache.wicket.request.AbstractRequestCycleProcessor.respond(AbstractRequestCycleProcessor.java:105)
at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1249)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1320)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1419)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:456)
display page view
NB : it was on a page with a Tree if it can help...