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Posted to users@wicket.apache.org by Martin Makundi <ma...@koodaripalvelut.com> on 2011/08/19 10:59:15 UTC
Strange error
Hi!
What can be the cause of this error, how can there be concurrent
modification to a item on a page being serialized?
**
Martin
java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
at java.util.TreeMap$EntryIterator.next(TreeMap.java:1136)
at java.util.TreeMap$EntryIterator.next(TreeMap.java:1131)
at java.util.TreeMap.writeObject(TreeMap.java:2250)
at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at java.util.HashMap.writeObject(HashMap.java:1001)
at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
at org.apache.wicket.Component.writeObject(Component.java:4702)
at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at java.util.LinkedList.writeObject(LinkedList.java:943)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at java.util.LinkedList.writeObject(LinkedList.java:943)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at java.util.LinkedList.writeObject(LinkedList.java:943)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at java.util.ArrayList.writeObject(ArrayList.java:570)
at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
at org.apache.wicket.Component.writeObject(Component.java:4702)
at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.writeObjectOverride(IObjectStreamFactory.java:121)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1124)
at org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:203)
at org.apache.wicket.protocol.http.pagestore.DiskPageStore.storePage(DiskPageStore.java:840)
at org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.put(SecondLevelCacheSessionStore.java:332)
at org.apache.wicket.Session.requestDetached(Session.java:1435)
at org.apache.wicket.RequestCycle.detach(RequestCycle.java:1176)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1462)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at wicket.quickstart.TakpServlet.service(TakpServlet.java:74)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:389)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
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Re: Strange error
Posted by Martin Makundi <ma...@koodaripalvelut.com>.
Yeah, is 1.4, but it should be behind pagemap lock..
**
Martin
2011/8/20 Martin Grigorov <mg...@apache.org>
> For 1.5 I can say that this is definitely true, the code is in
> org.apache.wicket.page.PageAccessSynchronizer.adapt(...).new
> PageManagerDecorator() {...}.commitRequest()
>
> The related code in 1.4 is in
> org.apache.wicket.Session.requestDetached() but I'm not sure what
> exactly happens there.
>
>
> On Sat, Aug 20, 2011 at 6:39 AM, Martin Makundi
> <ma...@koodaripalvelut.com> wrote:
> > I believe there are numerous such Maps, but what can be the cause of
> > concurrent modification? Wicket should be allowing only single thread
> > operating on the object?
> >
> >
> > **
> > Martin
> >
> > 2011/8/19 Dan Retzlaff <dr...@gmail.com>:
> >> I tend to agree that odds of a Wicket bug in this area are small. Can
> you
> >> think of a case in your application where a component has a HashMap of
> >> objects which have a TreeMap of objects? Maybe the source of this
> collection
> >> within your application is the problem.
> >>
> >> On Fri, Aug 19, 2011 at 8:50 AM, Martin Makundi <
> >> martin.makundi@koodaripalvelut.com> wrote:
> >>
> >>> Hi!
> >>>
> >>> I don't know how to reproduce it... and I wonder, because there is
> >>> pagemap lock, what else can be modifying stuff during page
> >>> serialization?
> >>>
> >>> **
> >>> Martin
> >>>
> >>> 2011/8/19 Dan Retzlaff <dr...@gmail.com>:
> >>> > How reproducible is this? I don't know how the serialization process
> >>> itself
> >>> > would cause this, but if it's intermittent then maybe there's a
> threading
> >>> /
> >>> > synchronization bug somewhere.
> >>> >
> >>> > On Fri, Aug 19, 2011 at 1:59 AM, Martin Makundi <
> >>> > martin.makundi@koodaripalvelut.com> wrote:
> >>> >
> >>> >> Hi!
> >>> >>
> >>> >> What can be the cause of this error, how can there be concurrent
> >>> >> modification to a item on a page being serialized?
> >>> >>
> >>> >> **
> >>> >> Martin
> >>> >>
> >>> >>
> >>> >> java.util.ConcurrentModificationException
> >>> >> at
> >>> >> java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
> >>> >> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1136)
> >>> >> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1131)
> >>> >> at java.util.TreeMap.writeObject(TreeMap.java:2250)
> >>> >> at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown
> Source)
> >>> >> at
> >>> >>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >>> >> at
> >>> >>
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >>> >> at java.util.HashMap.writeObject(HashMap.java:1001)
> >>> >> at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown
> Source)
> >>> >> at
> >>> >>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >>> >> at
> >>> >>
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
> >>> >> at
> org.apache.wicket.Component.writeObject(Component.java:4702)
> >>> >> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown
> Source)
> >>> >> at
> >>> >>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >>> >> at
> >>> >>
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >>> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
> >>> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown
> Source)
> >>> >> at
> >>> >>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >>> >> at
> >>> >>
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >>> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
> >>> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown
> Source)
> >>> >> at
> >>> >>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >>> >> at
> >>> >>
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >>> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
> >>> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown
> Source)
> >>> >> at
> >>> >>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >>> >> at
> >>> >>
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >>> >> at java.util.ArrayList.writeObject(ArrayList.java:570)
> >>> >> at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown
> Source)
> >>> >> at
> >>> >>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >>> >> at
> >>> >>
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
> >>> >> at
> org.apache.wicket.Component.writeObject(Component.java:4702)
> >>> >> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown
> Source)
> >>> >> at
> >>> >>
> >>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >>> >> at
> >>> >>
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >>> >> at
> >>> >>
> >>>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >>> >> at
> >>> >>
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >>> >> at
> >>> >>
> >>>
> org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.writeObjectOverride(IObjectStreamFactory.java:121)
> >>> >> at
> >>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >>> >> at
> >>> >>
> org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1124)
> >>> >> at
> >>> >>
> >>>
> org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:203)
> >>> >> at
> >>> >>
> >>>
> org.apache.wicket.protocol.http.pagestore.DiskPageStore.storePage(DiskPageStore.java:840)
> >>> >> at
> >>> >>
> >>>
> org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.put(SecondLevelCacheSessionStore.java:332)
> >>> >> at
> org.apache.wicket.Session.requestDetached(Session.java:1435)
> >>> >> at
> org.apache.wicket.RequestCycle.detach(RequestCycle.java:1176)
> >>> >> at
> org.apache.wicket.RequestCycle.steps(RequestCycle.java:1462)
> >>> >> at
> org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
> >>> >> at
> >>> >>
> >>>
> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
> >>> >> at
> >>> >>
> >>>
> org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)
> >>> >> at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> >>> >> at wicket.quickstart.TakpServlet.service(TakpServlet.java:74)
> >>> >> at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> >>> >> at
> >>> >>
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> >>> >> at
> >>> >>
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:389)
> >>> >> at
> >>> >>
> >>>
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> >>> >> at
> >>> >>
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> >>> >> at
> >>> >>
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> >>> >> at
> >>> >>
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
> >>> >> at
> >>> >>
> >>>
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> >>> >> at
> >>> >>
> >>>
> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
> >>> >> at
> >>> >>
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> >>> >> at org.mortbay.jetty.Server.handle(Server.java:326)
> >>> >> at
> >>> >>
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> >>> >> at
> >>> >>
> >>>
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> >>> >> at
> org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> >>> >> at
> >>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> >>> >> at
> >>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> >>> >> at
> >>> >>
> >>>
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> >>> >> at
> >>> >>
> >>>
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
> >>> >>
> >>> >>
> ---------------------------------------------------------------------
> >>> >> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> >>> >> For additional commands, e-mail: users-help@wicket.apache.org
> >>> >>
> >>> >>
> >>> >
> >>>
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> >>> For additional commands, e-mail: users-help@wicket.apache.org
> >>>
> >>>
> >>
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > For additional commands, e-mail: users-help@wicket.apache.org
> >
> >
>
>
>
> --
> Martin Grigorov
> jWeekend
> Training, Consulting, Development
> http://jWeekend.com
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
Re: Strange error
Posted by Martin Grigorov <mg...@apache.org>.
For 1.5 I can say that this is definitely true, the code is in
org.apache.wicket.page.PageAccessSynchronizer.adapt(...).new
PageManagerDecorator() {...}.commitRequest()
The related code in 1.4 is in
org.apache.wicket.Session.requestDetached() but I'm not sure what
exactly happens there.
On Sat, Aug 20, 2011 at 6:39 AM, Martin Makundi
<ma...@koodaripalvelut.com> wrote:
> I believe there are numerous such Maps, but what can be the cause of
> concurrent modification? Wicket should be allowing only single thread
> operating on the object?
>
>
> **
> Martin
>
> 2011/8/19 Dan Retzlaff <dr...@gmail.com>:
>> I tend to agree that odds of a Wicket bug in this area are small. Can you
>> think of a case in your application where a component has a HashMap of
>> objects which have a TreeMap of objects? Maybe the source of this collection
>> within your application is the problem.
>>
>> On Fri, Aug 19, 2011 at 8:50 AM, Martin Makundi <
>> martin.makundi@koodaripalvelut.com> wrote:
>>
>>> Hi!
>>>
>>> I don't know how to reproduce it... and I wonder, because there is
>>> pagemap lock, what else can be modifying stuff during page
>>> serialization?
>>>
>>> **
>>> Martin
>>>
>>> 2011/8/19 Dan Retzlaff <dr...@gmail.com>:
>>> > How reproducible is this? I don't know how the serialization process
>>> itself
>>> > would cause this, but if it's intermittent then maybe there's a threading
>>> /
>>> > synchronization bug somewhere.
>>> >
>>> > On Fri, Aug 19, 2011 at 1:59 AM, Martin Makundi <
>>> > martin.makundi@koodaripalvelut.com> wrote:
>>> >
>>> >> Hi!
>>> >>
>>> >> What can be the cause of this error, how can there be concurrent
>>> >> modification to a item on a page being serialized?
>>> >>
>>> >> **
>>> >> Martin
>>> >>
>>> >>
>>> >> java.util.ConcurrentModificationException
>>> >> at
>>> >> java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
>>> >> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1136)
>>> >> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1131)
>>> >> at java.util.TreeMap.writeObject(TreeMap.java:2250)
>>> >> at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
>>> >> at
>>> >>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>>> >> at
>>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>>> >> at java.util.HashMap.writeObject(HashMap.java:1001)
>>> >> at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
>>> >> at
>>> >>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>>> >> at
>>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
>>> >> at org.apache.wicket.Component.writeObject(Component.java:4702)
>>> >> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
>>> >> at
>>> >>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>>> >> at
>>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>>> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
>>> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
>>> >> at
>>> >>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>>> >> at
>>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>>> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
>>> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
>>> >> at
>>> >>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>>> >> at
>>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>>> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
>>> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
>>> >> at
>>> >>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>>> >> at
>>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>>> >> at java.util.ArrayList.writeObject(ArrayList.java:570)
>>> >> at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
>>> >> at
>>> >>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>>> >> at
>>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
>>> >> at org.apache.wicket.Component.writeObject(Component.java:4702)
>>> >> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
>>> >> at
>>> >>
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>>> >> at
>>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>>> >> at
>>> >>
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>>> >> at
>>> >>
>>> org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.writeObjectOverride(IObjectStreamFactory.java:121)
>>> >> at
>>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
>>> >> at
>>> >> org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1124)
>>> >> at
>>> >>
>>> org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:203)
>>> >> at
>>> >>
>>> org.apache.wicket.protocol.http.pagestore.DiskPageStore.storePage(DiskPageStore.java:840)
>>> >> at
>>> >>
>>> org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.put(SecondLevelCacheSessionStore.java:332)
>>> >> at org.apache.wicket.Session.requestDetached(Session.java:1435)
>>> >> at org.apache.wicket.RequestCycle.detach(RequestCycle.java:1176)
>>> >> at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1462)
>>> >> at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
>>> >> at
>>> >>
>>> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
>>> >> at
>>> >>
>>> org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)
>>> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
>>> >> at wicket.quickstart.TakpServlet.service(TakpServlet.java:74)
>>> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>>> >> at
>>> >> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>>> >> at
>>> >> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:389)
>>> >> at
>>> >>
>>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>>> >> at
>>> >> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>>> >> at
>>> >> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
>>> >> at
>>> >> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>>> >> at
>>> >>
>>> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>>> >> at
>>> >>
>>> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
>>> >> at
>>> >> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>>> >> at org.mortbay.jetty.Server.handle(Server.java:326)
>>> >> at
>>> >> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>>> >> at
>>> >>
>>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>>> >> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
>>> >> at
>>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
>>> >> at
>>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
>>> >> at
>>> >>
>>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>>> >> at
>>> >>
>>> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
>>> >>
>>> >> ---------------------------------------------------------------------
>>> >> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> >> For additional commands, e-mail: users-help@wicket.apache.org
>>> >>
>>> >>
>>> >
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
--
Martin Grigorov
jWeekend
Training, Consulting, Development
http://jWeekend.com
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Re: Strange error
Posted by Martin Makundi <ma...@koodaripalvelut.com>.
I believe there are numerous such Maps, but what can be the cause of
concurrent modification? Wicket should be allowing only single thread
operating on the object?
**
Martin
2011/8/19 Dan Retzlaff <dr...@gmail.com>:
> I tend to agree that odds of a Wicket bug in this area are small. Can you
> think of a case in your application where a component has a HashMap of
> objects which have a TreeMap of objects? Maybe the source of this collection
> within your application is the problem.
>
> On Fri, Aug 19, 2011 at 8:50 AM, Martin Makundi <
> martin.makundi@koodaripalvelut.com> wrote:
>
>> Hi!
>>
>> I don't know how to reproduce it... and I wonder, because there is
>> pagemap lock, what else can be modifying stuff during page
>> serialization?
>>
>> **
>> Martin
>>
>> 2011/8/19 Dan Retzlaff <dr...@gmail.com>:
>> > How reproducible is this? I don't know how the serialization process
>> itself
>> > would cause this, but if it's intermittent then maybe there's a threading
>> /
>> > synchronization bug somewhere.
>> >
>> > On Fri, Aug 19, 2011 at 1:59 AM, Martin Makundi <
>> > martin.makundi@koodaripalvelut.com> wrote:
>> >
>> >> Hi!
>> >>
>> >> What can be the cause of this error, how can there be concurrent
>> >> modification to a item on a page being serialized?
>> >>
>> >> **
>> >> Martin
>> >>
>> >>
>> >> java.util.ConcurrentModificationException
>> >> at
>> >> java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
>> >> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1136)
>> >> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1131)
>> >> at java.util.TreeMap.writeObject(TreeMap.java:2250)
>> >> at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
>> >> at
>> >>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>> >> at
>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> >> at java.util.HashMap.writeObject(HashMap.java:1001)
>> >> at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
>> >> at
>> >>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>> >> at
>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
>> >> at org.apache.wicket.Component.writeObject(Component.java:4702)
>> >> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
>> >> at
>> >>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>> >> at
>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
>> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
>> >> at
>> >>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>> >> at
>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
>> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
>> >> at
>> >>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>> >> at
>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
>> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
>> >> at
>> >>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>> >> at
>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> >> at java.util.ArrayList.writeObject(ArrayList.java:570)
>> >> at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
>> >> at
>> >>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>> >> at
>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
>> >> at org.apache.wicket.Component.writeObject(Component.java:4702)
>> >> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
>> >> at
>> >>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> >> at java.lang.reflect.Method.invoke(Method.java:597)
>> >> at
>> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>> >> at
>> >>
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> >> at
>> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> >> at
>> >>
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> >> at
>> >>
>> org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.writeObjectOverride(IObjectStreamFactory.java:121)
>> >> at
>> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
>> >> at
>> >> org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1124)
>> >> at
>> >>
>> org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:203)
>> >> at
>> >>
>> org.apache.wicket.protocol.http.pagestore.DiskPageStore.storePage(DiskPageStore.java:840)
>> >> at
>> >>
>> org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.put(SecondLevelCacheSessionStore.java:332)
>> >> at org.apache.wicket.Session.requestDetached(Session.java:1435)
>> >> at org.apache.wicket.RequestCycle.detach(RequestCycle.java:1176)
>> >> at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1462)
>> >> at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
>> >> at
>> >>
>> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
>> >> at
>> >>
>> org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)
>> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
>> >> at wicket.quickstart.TakpServlet.service(TakpServlet.java:74)
>> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>> >> at
>> >> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>> >> at
>> >> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:389)
>> >> at
>> >>
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> >> at
>> >> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>> >> at
>> >> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
>> >> at
>> >> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>> >> at
>> >>
>> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>> >> at
>> >>
>> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
>> >> at
>> >> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>> >> at org.mortbay.jetty.Server.handle(Server.java:326)
>> >> at
>> >> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>> >> at
>> >>
>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>> >> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
>> >> at
>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
>> >> at
>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
>> >> at
>> >>
>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>> >> at
>> >>
>> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
>> >>
>> >> ---------------------------------------------------------------------
>> >> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> >> For additional commands, e-mail: users-help@wicket.apache.org
>> >>
>> >>
>> >
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org
Re: Strange error
Posted by Dan Retzlaff <dr...@gmail.com>.
I tend to agree that odds of a Wicket bug in this area are small. Can you
think of a case in your application where a component has a HashMap of
objects which have a TreeMap of objects? Maybe the source of this collection
within your application is the problem.
On Fri, Aug 19, 2011 at 8:50 AM, Martin Makundi <
martin.makundi@koodaripalvelut.com> wrote:
> Hi!
>
> I don't know how to reproduce it... and I wonder, because there is
> pagemap lock, what else can be modifying stuff during page
> serialization?
>
> **
> Martin
>
> 2011/8/19 Dan Retzlaff <dr...@gmail.com>:
> > How reproducible is this? I don't know how the serialization process
> itself
> > would cause this, but if it's intermittent then maybe there's a threading
> /
> > synchronization bug somewhere.
> >
> > On Fri, Aug 19, 2011 at 1:59 AM, Martin Makundi <
> > martin.makundi@koodaripalvelut.com> wrote:
> >
> >> Hi!
> >>
> >> What can be the cause of this error, how can there be concurrent
> >> modification to a item on a page being serialized?
> >>
> >> **
> >> Martin
> >>
> >>
> >> java.util.ConcurrentModificationException
> >> at
> >> java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
> >> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1136)
> >> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1131)
> >> at java.util.TreeMap.writeObject(TreeMap.java:2250)
> >> at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
> >> at
> >>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >> at
> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >> at java.util.HashMap.writeObject(HashMap.java:1001)
> >> at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
> >> at
> >>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >> at
> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
> >> at org.apache.wicket.Component.writeObject(Component.java:4702)
> >> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
> >> at
> >>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >> at
> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
> >> at
> >>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >> at
> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
> >> at
> >>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >> at
> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >> at java.util.LinkedList.writeObject(LinkedList.java:943)
> >> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
> >> at
> >>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >> at
> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >> at java.util.ArrayList.writeObject(ArrayList.java:570)
> >> at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
> >> at
> >>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >> at
> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
> >> at org.apache.wicket.Component.writeObject(Component.java:4702)
> >> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
> >> at
> >>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >> at java.lang.reflect.Method.invoke(Method.java:597)
> >> at
> >> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> >> at
> >>
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> >> at
> >> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> >> at
> >>
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> >> at
> >> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> >> at
> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> >> at
> >>
> org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.writeObjectOverride(IObjectStreamFactory.java:121)
> >> at
> >> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >> at
> >> org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1124)
> >> at
> >>
> org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:203)
> >> at
> >>
> org.apache.wicket.protocol.http.pagestore.DiskPageStore.storePage(DiskPageStore.java:840)
> >> at
> >>
> org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.put(SecondLevelCacheSessionStore.java:332)
> >> at org.apache.wicket.Session.requestDetached(Session.java:1435)
> >> at org.apache.wicket.RequestCycle.detach(RequestCycle.java:1176)
> >> at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1462)
> >> at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
> >> at
> >>
> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
> >> at
> >>
> org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)
> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> >> at wicket.quickstart.TakpServlet.service(TakpServlet.java:74)
> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> >> at
> >> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> >> at
> >> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:389)
> >> at
> >>
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> >> at
> >> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> >> at
> >> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> >> at
> >> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
> >> at
> >>
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> >> at
> >>
> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
> >> at
> >> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> >> at org.mortbay.jetty.Server.handle(Server.java:326)
> >> at
> >> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> >> at
> >>
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> >> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> >> at
> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> >> at
> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> >> at
> >>
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> >> at
> >>
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> >> For additional commands, e-mail: users-help@wicket.apache.org
> >>
> >>
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
Re: Strange error
Posted by Martin Makundi <ma...@koodaripalvelut.com>.
Hi!
I don't know how to reproduce it... and I wonder, because there is
pagemap lock, what else can be modifying stuff during page
serialization?
**
Martin
2011/8/19 Dan Retzlaff <dr...@gmail.com>:
> How reproducible is this? I don't know how the serialization process itself
> would cause this, but if it's intermittent then maybe there's a threading /
> synchronization bug somewhere.
>
> On Fri, Aug 19, 2011 at 1:59 AM, Martin Makundi <
> martin.makundi@koodaripalvelut.com> wrote:
>
>> Hi!
>>
>> What can be the cause of this error, how can there be concurrent
>> modification to a item on a page being serialized?
>>
>> **
>> Martin
>>
>>
>> java.util.ConcurrentModificationException
>> at
>> java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
>> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1136)
>> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1131)
>> at java.util.TreeMap.writeObject(TreeMap.java:2250)
>> at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> at java.util.HashMap.writeObject(HashMap.java:1001)
>> at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
>> at org.apache.wicket.Component.writeObject(Component.java:4702)
>> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> at java.util.LinkedList.writeObject(LinkedList.java:943)
>> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> at java.util.LinkedList.writeObject(LinkedList.java:943)
>> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> at java.util.LinkedList.writeObject(LinkedList.java:943)
>> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> at java.util.ArrayList.writeObject(ArrayList.java:570)
>> at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
>> at org.apache.wicket.Component.writeObject(Component.java:4702)
>> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
>> at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
>> at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
>> at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
>> at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
>> at
>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
>> at
>> org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.writeObjectOverride(IObjectStreamFactory.java:121)
>> at
>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
>> at
>> org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1124)
>> at
>> org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:203)
>> at
>> org.apache.wicket.protocol.http.pagestore.DiskPageStore.storePage(DiskPageStore.java:840)
>> at
>> org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.put(SecondLevelCacheSessionStore.java:332)
>> at org.apache.wicket.Session.requestDetached(Session.java:1435)
>> at org.apache.wicket.RequestCycle.detach(RequestCycle.java:1176)
>> at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1462)
>> at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
>> at
>> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
>> at
>> org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
>> at wicket.quickstart.TakpServlet.service(TakpServlet.java:74)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>> at
>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>> at
>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:389)
>> at
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> at
>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>> at
>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
>> at
>> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>> at
>> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>> at
>> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
>> at
>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>> at org.mortbay.jetty.Server.handle(Server.java:326)
>> at
>> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>> at
>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
>> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
>> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
>> at
>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>> at
>> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org
Re: Strange error
Posted by Dan Retzlaff <dr...@gmail.com>.
How reproducible is this? I don't know how the serialization process itself
would cause this, but if it's intermittent then maybe there's a threading /
synchronization bug somewhere.
On Fri, Aug 19, 2011 at 1:59 AM, Martin Makundi <
martin.makundi@koodaripalvelut.com> wrote:
> Hi!
>
> What can be the cause of this error, how can there be concurrent
> modification to a item on a page being serialized?
>
> **
> Martin
>
>
> java.util.ConcurrentModificationException
> at
> java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1136)
> at java.util.TreeMap$EntryIterator.next(TreeMap.java:1131)
> at java.util.TreeMap.writeObject(TreeMap.java:2250)
> at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> at java.util.HashMap.writeObject(HashMap.java:1001)
> at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
> at org.apache.wicket.Component.writeObject(Component.java:4702)
> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> at java.util.LinkedList.writeObject(LinkedList.java:943)
> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> at java.util.LinkedList.writeObject(LinkedList.java:943)
> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> at java.util.LinkedList.writeObject(LinkedList.java:943)
> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> at java.util.ArrayList.writeObject(ArrayList.java:570)
> at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:422)
> at org.apache.wicket.Component.writeObject(Component.java:4702)
> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
> at
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
> at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
> at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> at
> org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.writeObjectOverride(IObjectStreamFactory.java:121)
> at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> at
> org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1124)
> at
> org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:203)
> at
> org.apache.wicket.protocol.http.pagestore.DiskPageStore.storePage(DiskPageStore.java:840)
> at
> org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.put(SecondLevelCacheSessionStore.java:332)
> at org.apache.wicket.Session.requestDetached(Session.java:1435)
> at org.apache.wicket.RequestCycle.detach(RequestCycle.java:1176)
> at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1462)
> at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
> at
> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
> at
> org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> at wicket.quickstart.TakpServlet.service(TakpServlet.java:74)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:389)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
> at
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> at
> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>