[jboss-user] [JBoss Seam] - session timeout always throw exception

[jyc5131]

i am using the Jboss 4.0.4.GA SEAM 1.0.1.GA 
when the session time out, i will get below trace, i cannot find out something that cannot be serialized. any helps is welcome 
  | 2006-11-17 16:29:28,047 WARN  [org.jboss.seam.contexts.Contexts] Could not destroy component: myService
  | java.lang.RuntimeException: org.jboss.serial.exception.SerializationException: Could not create instance of org.jboss.seam.contexts.WebSessionContext - org.jboss.seam.contexts.WebSessionContext
  | 	at org.jboss.ejb3.stateful.StatefulBeanContext.extractBeanAndInterceptors(StatefulBeanContext.java:365)
  | 	at org.jboss.ejb3.stateful.StatefulBeanContext.getInstance(StatefulBeanContext.java:309)
  | 	at org.jboss.ejb3.AbstractPool.remove(AbstractPool.java:169)
  | 	at org.jboss.ejb3.cache.simple.SimpleStatefulCache.remove(SimpleStatefulCache.java:299)
  | 	at org.jboss.ejb3.stateful.StatefulRemoveInterceptor.removeSession(StatefulRemoveInterceptor.java:126)
  | 	at org.jboss.ejb3.stateful.StatefulRemoveInterceptor.invoke(StatefulRemoveInterceptor.java:87)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 	at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 	at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 	at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 	at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:188)
  | 	at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98)
  | 	at $Proxy526.destroy(Unknown Source)
  | 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  | 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  | 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  | 	at java.lang.reflect.Method.invoke(Method.java:585)
  | 	at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  | 	at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:32)
  | 	at org.jboss.seam.contexts.Contexts.callDestroyMethod(Contexts.java:211)
  | 	at org.jboss.seam.contexts.Contexts.destroy(Contexts.java:189)
  | 	at org.jboss.seam.contexts.Lifecycle.endSession(Lifecycle.java:195)
  | 	at org.jboss.seam.servlet.SeamListener.sessionDestroyed(SeamListener.java:45)
  | 	at org.apache.catalina.session.StandardSession.expire(StandardSession.java:687)
  | 	at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:579)
  | 	at org.apache.catalina.session.ManagerBase.processExpires(ManagerBase.java:678)
  | 	at org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:663)
  | 	at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1284)
  | 	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1569)
  | 	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578)
  | 	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578)
  | 	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1558)
  | 	at java.lang.Thread.run(Thread.java:595)
  | Caused by: org.jboss.serial.exception.SerializationException: Could not create instance of org.jboss.seam.contexts.WebSessionContext - org.jboss.seam.contexts.WebSessionContext
  | 	at org.jboss.serial.classmetamodel.ClassMetaData.newInstance(ClassMetaData.java:327)
  | 	at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:239)
  | 	at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:411)
  | 	at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:81)
  | 	at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:639)
  | 	at org.jboss.serial.persister.RegularObjectPersister.readSlotWithFields(RegularObjectPersister.java:353)
  | 	at org.jboss.serial.persister.RegularObjectPersister.defaultRead(RegularObjectPersister.java:273)
  | 	at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:241)
  | 	at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:411)
  | 	at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:81)
  | 	at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:639)
  | 	at org.jboss.serial.persister.ArrayPersister.readObjectArray(ArrayPersister.java:196)
  | 	at org.jboss.serial.persister.ArrayPersister.readData(ArrayPersister.java:172)
  | 	at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:411)
  | 	at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:81)
  | 	at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:639)
  | 	at org.jboss.serial.io.JBossObjectInputStream.readObjectOverride(JBossObjectInputStream.java:165)
  | 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:343)
  | 	at org.jboss.serial.io.MarshalledObject.get(MarshalledObject.java:68)
  | 	at org.jboss.ejb3.stateful.StatefulBeanContext.extractBeanAndInterceptors(StatefulBeanContext.java:342)
  | 	... 35 more
  | Caused by: java.lang.InstantiationException: org.jboss.seam.contexts.WebSessionContext
  | 	at java.lang.Class.newInstance0(Class.java:335)
  | 	at java.lang.Class.newInstance(Class.java:303)
  | 	at org.jboss.serial.classmetamodel.ClassMetaData.newInstance(ClassMetaData.java:319)

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