When clicking on a link (i.e., ?5-1.ILinkListener-...) after a session expired,
this error page shows up on my browser window:
Exception report
message
description The server encountered an internal error () that prevented it from
fulfilling this request.
exception
java.util.ConcurrentModificationException
java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
java.util.AbstractList$Itr.next(AbstractList.java:343)
org.apache.wicket.request.RequestHandlerStack.detach(RequestHandlerStack.java:176)
org.apache.wicket.request.cycle.RequestCycle.onDetach(RequestCycle.java:565)
org.apache.wicket.request.cycle.RequestCycle.detach(RequestCycle.java:508)
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:284)
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)
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:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:774)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
at
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:896)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
at java.lang.Thread.run(Thread.java:662)
This ConcurrentModificationException occurs about 70+ times on an application
server daily.
Wicket version 1.5.3.
Any suggestion on how to avoid this?
In the init method of sub-class of the WebApplication , I have:
IApplicationSettings settings = getApplicationSettings();
settings.setAccessDeniedPage(AccessErr.class);
settings.setPageExpiredErrorPage(SessionErr.class);
settings.setInternalErrorPage(InternalErr.class);
When a session expired, should it invoke the PageExpiredErrorPage?
-Fang
