Hi

I'm using JBoss 4.0.3. From my session bean I'm writing an object from the client and then trying to read it. An exception is thrown while returning from the method call that reads the object. The persistent object being returned has a List of another persistent objects which is retrieve by LEFT FETCH JOIN.
Any input will be appreciated. The exception is as follows:

java.lang.reflect.UndeclaredThrowableException
at $Proxy0.lookupOrder(Unknown Source)
at tut1client.client.Main.main(Main.java:56)
Caused by: java.rmi.ConnectException: Failed to communicate. Problem during marshalling/unmarshalling; nested exception is:
java.io.InvalidClassException: org.hibernate.collection.AbstractPersistentCollection; local class incompatible: stream classdesc serialVersionUID = 7602608801868099635, local class serialVersionUID = -6208749127098131726
at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(SocketClientInvoker.java:264)
at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:112)
at org.jboss.remoting.Client.invoke(Client.java:226)
at org.jboss.remoting.Client.invoke(Client.java:189)
at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:41)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:46)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:40)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:41)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:88)
... 2 more
Caused by: java.io.InvalidClassException: org.hibernate.collection.AbstractPersistentCollection; local class incompatible: stream classdesc serialVersionUID = 7602608801868099635, local class serialVersionUID = -6208749127098131726
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:519)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1546)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1546)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.aop.joinpoint.InvocationResponse.readExternal(InvocationResponse.java:107)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1711)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:73)
at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(SocketClientInvoker.java:242)
... 14 more

Hi!

I got a similar exception with JBoss4.03.sp1 and Hibernate3:The solution was to use in my project precisely that hibernate3.jar which comes with the JBoss distro. It's located in */server/default/lib

i got the same error in jboss 4.0.2. i replaced the hibernate3.jar (Which comes with hibernate 3.3 full release) with another hibenate3.jar(comes with jboss).