Touching page null/3 couldn't be done in thread

Hi all
I am getting the following exception.

java.lang.RuntimeException: Touching page null/3 couldn't be done in thread: http-11001-33 
    	at com.servoy.j2db.server.headlessclient.MainPage.touch(MainPage.java:1710) 
    	at com.servoy.j2db.server.headlessclient.MainPage.touch(MainPage.java:1683) 
    	at com.servoy.j2db.server.headlessclient.WebForm.touch(WebForm.java:945) 
    	at com.servoy.j2db.FormController.refreshAllPartRenderers(FormController.java:703) 
    	at com.servoy.j2db.BasicFormController.valueChanged(BasicFormController.java:469) 
    	at com.servoy.j2db.BasicFormController.tableChanged(BasicFormController.java:420) 
    	at com.servoy.j2db.dataprocessing.TableAndListEventDelegate.fireTableModelEvent(TableAndListEventDelegate.java:76) 
    	at com.servoy.j2db.dataprocessing.TableAndListEventDelegate$1.run(TableAndListEventDelegate.java:169) 
    	at com.servoy.j2db.dataprocessing.TableAndListEventDelegate.fireTableAndListEvent(TableAndListEventDelegate.java:180) 
    	at com.servoy.j2db.dataprocessing.SwingFoundSet.fireFoundSetEvent(SwingFoundSet.java:158) 
    	at com.servoy.j2db.dataprocessing.EditRecordList.fireEvents(EditRecordList.java:1265) 
    	at com.servoy.j2db.dataprocessing.FoundSet.fireAggregateChangeWithEvents(FoundSet.java:5338) 
    	at com.servoy.j2db.dataprocessing.RelatedFoundSet.notifyChange_checkForUpdate(RelatedFoundSet.java:744) 
    	at com.servoy.j2db.dataprocessing.RelatedFoundSet.notifyChange(RelatedFoundSet.java:609) 
    	at com.servoy.j2db.dataprocessing.RowManager.fireNotifyChange(RowManager.java:598) 
    	at com.servoy.j2db.dataprocessing.RowManager.changeByOther(RowManager.java:378) 
    	at com.servoy.j2db.dataprocessing.FoundSetManager.notifyDataChange(FoundSetManager.java:2182) 
    	at com.servoy.j2db.ClientStub$5$1.run(ClientStub.java:196) 
    	at com.servoy.j2db.server.headlessclient.EventsRunnable.run(EventsRunnable.java:58) 
    	at com.servoy.j2db.server.headlessclient.WebClient.executeEvents(WebClient.java:566) 
    	at com.servoy.j2db.server.headlessclient.WebClient.onBeginRequest(WebClient.java:1093) 
    	at com.servoy.j2db.server.headlessclient.ServoyRequestCycle.onBeginRequest(ServoyRequestCycle.java:83) 
    	at org.apache.wicket.RequestCycle.prepare(RequestCycle.java:1269) 
    	at org.apache.wicket.RequestCycle.step(RequestCycle.java:1333) 
    	at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1465) 
    	at org.apache.wicket.RequestCycle.request(RequestCycle.java:545) 
    	at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486) 
    	at com.servoy.j2db.server.servlets.Zt.doGet(Zt.java:1) 
    	at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138) 
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) 
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    	at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176) 
    	at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145) 
    	at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92) 
    	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394) 
    	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:233) 
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 
    	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:615) 
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) 
    	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861) 
    	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606) 
    	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    	at java.lang.Thread.run(Thread.java:748) 
    Caused by: org.apache.wicket.WicketRuntimeException: After 1 minute the Pagemap null is still locked by: Thread[http-11001-14,5,main], giving up trying to get the page for path: 3 
    	at com.servoy.j2db.dataprocessing.RowManager.foundSetChanged(RowManager.java:1310) 
    	at com.servoy.j2db.dataprocessing.FoundSetManager$GlobalFoundSetEventListener.foundSetChanged(FoundSetManager.java:2333) 
    	at com.servoy.j2db.dataprocessing.FoundSetManager$GlobalFoundSetEventListener.foundSetCreated(FoundSetManager.java:2318) 
    	at com.servoy.j2db.dataprocessing.FoundSetManager$GlobalFoundSetEventListener.foundSetsCreated(FoundSetManager.java:2306) 
    	at com.servoy.j2db.dataprocessing.FoundSetManager.getRelatedFoundSet(FoundSetManager.java:718) 
    	at com.servoy.j2db.dataprocessing.FoundSet.getRelatedFoundSet(FoundSet.java:5956) 
    	at com.servoy.j2db.dataprocessing.Record.getRelatedFoundSet(Record.java:689) 
    	at com.servoy.j2db.dataprocessing.Record.getRelatedFoundSet(Record.java:717) 
    	at com.servoy.j2db.dataprocessing.Record.getValue(Record.java:247) 
    	at com.servoy.j2db.dataprocessing.Record.getValue(Record.java:167) 
    	at com.servoy.j2db.dataprocessing.DisplaysAdapter.setRecord(DisplaysAdapter.java:115) 
    	at com.servoy.j2db.dataprocessing.DataAdapterList.setRecord(DataAdapterList.java:403) 
    	at com.servoy.j2db.server.headlessclient.dataui.WebDataRenderer.refreshRecord(WebDataRenderer.java:343) 
    	at com.servoy.j2db.FormController.refreshAllPartRenderers(FormController.java:729) 
    	at com.servoy.j2db.BasicFormController.valueChanged(BasicFormController.java:469) 
    	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:184) 
    	at com.servoy.j2db.util.model.AlwaysRowSelectedSelectionModel.fireValueChanged(AlwaysRowSelectedSelectionModel.java:245) 
    	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:154) 
    	at com.servoy.j2db.util.model.AlwaysRowSelectedSelectionModel.setSelectedRows(AlwaysRowSelectedSelectionModel.java:225) 
    	at com.servoy.j2db.util.model.AlwaysRowSelectedSelectionModel.setSelectedRow(AlwaysRowSelectedSelectionModel.java:190) 
    	at com.servoy.j2db.util.model.AlwaysRowSelectedSelectionModel.setSelectedRow(AlwaysRowSelectedSelectionModel.java:158) 
    	at com.servoy.j2db.dataprocessing.SwingFoundSet.setSelectedIndex(SwingFoundSet.java:134) 
    	at com.servoy.j2db.dataprocessing.FoundSet.jsFunction_setSelectedIndex(FoundSet.java:2957) 
    	at sun.reflect.GeneratedMethodAccessor201.invoke(Unknown Source) 
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    	at java.lang.reflect.Method.invoke(Method.java:498) 
    	at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:158) 
    	at org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java:312) 
    	at org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:1774) 
    	at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:837) 
    	at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:158) 
    	at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:406) 
    	at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3204) 
    	at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:156) 
    	at com.servoy.j2db.scripting.ScriptEngine.executeFunction(ScriptEngine.java:628) 
    	at com.servoy.j2db.BasicFormController.executeFunction(BasicFormController.java:818) 
    	at com.servoy.j2db.FormController.executeFunction(FormController.java:1274) 
    	at com.servoy.j2db.FormController.executeFunction(FormController.java:1141) 
    	at com.servoy.j2db.FormController$ScriptExecuter.executeFunction(FormController.java:1053) 
    	at com.servoy.j2db.ui.BaseEventExecutor.fireEventCommand(BaseEventExecutor.java:284) 
    	at com.servoy.j2db.ui.BaseEventExecutor.fireEventCommand(BaseEventExecutor.java:250) 
    	at com.servoy.j2db.ui.BaseEventExecutor.fireActionCommand(BaseEventExecutor.java:218) 
    	at com.servoy.j2db.server.headlessclient.dataui.WebEventExecutor.handleEvent(WebEventExecutor.java:496) 
    	at com.servoy.j2db.server.headlessclient.dataui.WebEventExecutor.onEvent(WebEventExecutor.java:427) 
    	at com.servoy.j2db.server.headlessclient.dataui.WebEventExecutor.onEvent(WebEventExecutor.java:400) 
    	at com.servoy.j2db.server.headlessclient.dataui.WebEventExecutor$2.onEvent(WebEventExecutor.java:196) 
    	at org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:177) 
    	at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:312) 
    	at org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:157) 
    	at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92) 
    	at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1279) 
    	at org.apache.wicket.RequestCycle.step(RequestCycle.java:1358) 
    	... 26 more

Can any one share me why this happening? Is this exception will slow the system?

Thanks,
Satya

Any suggestion ??? It’s slowing down the system.

Thanks,
Satya

The problem is that there is 1 request busy for more then 1 minute
then another request also wants to have data (could be ajax polling) but that will wait for 1 minute until it bombs out with that error
The cause is not that error, the cause is why is there another request busy for more then 1 minute, that makes the system slow.