[Hippo-cms7-user] Hunting down a NotSerializableException

Frank van Lankvelt f.vanlankvelt at onehippo.com
Tue Dec 29 16:18:15 CET 2009


yes, running the cms in development mode (setting the
"configuration"/"wicket.configuration" init parameter to "development") will
cause serialization after each request.  That is the easiest way to detect
these problems as soon as possible.

Once you have a reproduction path, hunting the problem down is something
different.  What I usually do is set a breakpoint at the point where the
exception is thrown (ObjectOutputStream.java:1156).  Then, you can walk the
stack to see what object is causing the serialization of a Node.  (I'm
guessing it's one of your own classes...)   It's a bit tedious, but you'll
get there.

cheers, Frank

On Tue, Dec 29, 2009 at 1:04 PM, Bart van der Schans <
b.vanderschans at onehippo.com> wrote:

> On Tue, Dec 29, 2009 at 12:26 PM, nvankampenhout
> <nvankampenhout at yahoo.co.uk> wrote:
> >
> >
> > Bart van der Schans-2 wrote:
> >>
> >> Hi Niels,
> >>
> >> Can you post the complete stack trace?
> >>
> >> Regards,
> >> Bart
> >>
> >
> > Hi Bart,
> >
> > I'm not sure if the stacktrace is of any help, because it doesn't show
> where
> > in the object graph the NotSerializable object is. But here it is, hold
> on,
> > it's huge:
> Would have been nice to see those 34 more.. So indeed this stack trace
> isn't helping a lot. It looks like the plugin has a reference to a
> Node field which is not serializable. I know Frank has been working on
> these kind of things and did have some tricks to localize these
> problems. IIRC he forced a serialization step after each page
> rendering so he could debug it more easily, but I don't know exactly
> how he did that. He will be back next week.
>
> Regards,
> Bart
>
>
>
> >
> > 29.12.2009 12:21:28 ERROR
> > [org.apache.wicket.markup.html.WebPage.onNewBrowserWindow():312] Page
> [Page
> > class =
> >
> > com.findlaw.hippo.cms.frontend.plugins.xinha.UploadXinhaDialog$1$1, id =
> 3,
> > version = 0] couldn't be cloned to
> >
> > move to another pagemap
> > org.apache.wicket.WicketRuntimeException: Internal error cloning object
> >        at
> org.apache.wicket.util.lang.Objects.cloneObject(Objects.java:529)
> >        at
> >
> org.apache.wicket.markup.html.WebPage.onNewBrowserWindow(WebPage.java:308)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        at
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >        at java.lang.reflect.Method.invoke(Method.java:597)
> >        at
> >
> org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:183)
> >        at
> >
> org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents
> >
> > (ListenerInterfaceRequestTarget.java:73)
> >        at
> > org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents
> >
> > (AbstractRequestCycleProcessor.java:91)
> >        at
> >
> org.hippoecm.frontend.PluginRequestCycleProcessor.processEvents(PluginRequestCycleProcessor.java:31)
> >        at
> >
> org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1175)
> >        at org.apache.wicket.RequestCycle.step(RequestCycle.java:1252)
> >        at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1353)
> >        at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)
> >        at
> > org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:355)
> >        at
> >
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:200)
> >        at
> >
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
> >        at
> >
> org.hippoecm.frontend.plugins.login.ConcurrentLoginFilter.doFilter(ConcurrentLoginFilter.java:54)
> >        at
> >
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
> >        at
> > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
> >        at
> >
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> >        at
> > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> >        at
> > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> >        at
> > org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
> >        at
> >
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> >        at
> >
> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
> >        at
> > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> >        at org.mortbay.jetty.Server.handle(Server.java:326)
> >        at
> > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> >        at
> >
> org.mortbay.jetty.HttpConnection$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)
> > Caused by: java.io.NotSerializableException:
> > org.hippoecm.repository.decorating.checked.NodeDecorator
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.TreeMap.writeObject(TreeMap.java:2252)
> >        at sun.reflect.GeneratedMethodAccessor15.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.GeneratedMethodAccessor16.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.ArrayList.writeObject(ArrayList.java:570)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.ArrayList.writeObject(ArrayList.java:570)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.GeneratedMethodAccessor16.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.TreeMap.writeObject(TreeMap.java:2252)
> >        at sun.reflect.GeneratedMethodAccessor15.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.GeneratedMethodAccessor16.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.TreeMap.writeObject(TreeMap.java:2252)
> >        at sun.reflect.GeneratedMethodAccessor15.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.GeneratedMethodAccessor16.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.HashMap.writeObject(HashMap.java:1000)
> >        at sun.reflect.GeneratedMethodAccessor10.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.TreeMap.writeObject(TreeMap.java:2252)
> >        at sun.reflect.GeneratedMethodAccessor15.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.GeneratedMethodAccessor16.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.ArrayList.writeObject(ArrayList.java:570)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.ArrayList.writeObject(ArrayList.java:570)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.GeneratedMethodAccessor14.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.HashMap.writeObject(HashMap.java:1001)
> >        at sun.reflect.GeneratedMethodAccessor10.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.GeneratedMethodAccessor16.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.TreeMap.writeObject(TreeMap.java:2252)
> >        at sun.reflect.GeneratedMethodAccessor15.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.GeneratedMethodAccessor16.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.ArrayList.writeObject(ArrayList.java:570)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.TreeMap.writeObject(TreeMap.java:2252)
> >        at sun.reflect.GeneratedMethodAccessor15.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.ArrayList.writeObject(ArrayList.java:570)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.ArrayList.writeObject(ArrayList.java:570)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.LinkedList.writeObject(LinkedList.java:943)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.HashMap.writeObject(HashMap.java:1001)
> >        at sun.reflect.GeneratedMethodAccessor10.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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.TreeMap.writeObject(TreeMap.java:2252)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at java.util.TreeMap.writeObject(TreeMap.java:2252)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at
> java.util.IdentityHashMap.writeObject(IdentityHashMap.java:1165)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at
> >
> org.hippoecm.frontend.plugin.impl.PluginContext.writeObject(PluginContext.java:320)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
> >        at org.apache.wicket.Component.writeObject(Component.java:4216)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >        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:1461)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> >
> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
> >        at
> > java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
> >        at
> >
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
> >        at
> > java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
> >        at
> > java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
> >        at
> org.apache.wicket.util.lang.Objects.cloneObject(Objects.java:475)
> >        ... 34 more
> >
> > --
> > View this message in context:
> http://n2.nabble.com/Hunting-down-a-NotSerializableException-tp4227031p4227327.html
> > Sent from the Hippo CMS 7 mailing list archive at Nabble.com.
> > _______________________________________________
> > Hippo-cms7-user mailing list and forums
> > http://www.onehippo.org/cms7/support/community.html
> >
>
>
>
> --
> Hippo B.V.  -  Amsterdam
> Oosteinde 11, 1017 WT, Amsterdam, +31(0)20-5224466
>
> Hippo USA Inc.  -  San Francisco
> 101 H Street, Suite Q, Petaluma CA, 94952-3329, +1 (707) 773-4646
> -----------------------------------------------------------------
> http://www.onehippo.com   -  info at onehippo.com
> -----------------------------------------------------------------
> _______________________________________________
> Hippo-cms7-user mailing list and forums
> http://www.onehippo.org/cms7/support/community.html
>
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