[jboss-user] [Clustering/JBoss] - java.lang.ClassNotFoundException: No ClassLoaders found for:

Hi all, I am trying to cluster 2 instances of jboss 4.2.2.GA version. When one of the server got down, the other instance which have to come to active have created this exception. 11:05:01,787 ERROR [JBossCacheService] loadSession(): id: uraX8t4OqkB4S--w2TOLvw** exception occurred during deserialization | java.lang.ClassNotFoundException: No ClassLoaders found for: com.casper.fw.lang.ColumnTitles | at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:212) | at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:521) | at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:415) | at java.lang.ClassLoader.loadClass(ClassLoader.java:251) | at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) | at java.lang.Class.forName0(Native Method) | at java.lang.Class.forName(Class.java:247) | at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:604) | at org.jboss.invocation.MarshalledValueInputStream.resolveClass(MarshalledValueInputStream.java:109) | at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575) | at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496) | at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1624) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at nextapp.echo2.app.event.EventListenerList.readObject(EventListenerList.java:141) | at sun.reflect.GeneratedMethodAccessor142.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.HashMap.readObject(HashMap.java:1029) | at sun.reflect.GeneratedMethodAccessor135.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at nextapp.echo2.app.event.EventListenerList.readObject(EventListenerList.java:141) | at sun.reflect.GeneratedMethodAccessor142.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at nextapp.echo2.app.event.EventListenerList.readObject(EventListenerList.java:141) | at sun.reflect.GeneratedMethodAccessor142.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.Hashtable.readObject(Hashtable.java:859) | at sun.reflect.GeneratedMethodAccessor153.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at nextapp.echo2.app.event.EventListenerList.readObject(EventListenerList.java:141) | at sun.reflect.GeneratedMethodAccessor142.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.ArrayList.readObject(ArrayList.java:593) | at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at java.util.concurrent.ConcurrentHashMap.readObject(ConcurrentHashMap.java:1275) | at sun.reflect.GeneratedMethodAccessor163.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) | at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846) | at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) | at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) | at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) | at org.jboss.web.tomcat.service.session.SessionBasedClusteredSession.readExternal(SessionBasedClusteredSession.java:154) | at org.jboss.web.tomcat.service.session.JBossCacheService.loadSession(JBossCacheService.java:278) | at org.jboss.web.tomcat.service.session.JBossCacheManager.loadSession(JBossCacheManager.java:1010) | at org.jboss.web.tomcat.service.session.JBossCacheManager.findSession(JBossCacheManager.java:782) | at org.apache.catalina.connector.Request.doGetSession(Request.java:2283) | at org.apache.catalina.connector.Request.getSession(Request.java:2075) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:132) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) | at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) | at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437) | at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366) | at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) | at java.lang.Thread.run(Thread.java:619) | Hoping to have some suggestions by the clustering experts, Thank you in advance. 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