[jboss-user] [JBoss Seam] - Serialization Exception after Session timeout

ollix do-not-reply at jboss.com
Sat Mar 24 08:32:38 EDT 2007

Hi there, 

I am having problems after a session timeout. 
When a session times out, my web page tries to access a property in an Stateful Session Bean in Session Scope and I get the following Exception:

Exception getting value of property headline.line1 of base of type : de.greenmiles.website.words.SessionWords$$EnhancerByCGLIB$$a4daa20d
Caused by: javax.ejb.EJBTransactionRolledbackException: java.lang.RuntimeException: org.jboss.serial.exception.SerializationException: Could not create instance of org.jboss.seam.persistence.EntityManagerProxy - org.jboss.seam.persistence.EntityManagerProxy

It seams to me, that this is some follow-up problem, but I have no idea, what could be wrong.

The exotic part in my setup is, that the session bean accesses another Stateful Session Bean in Application Scope, that is used as a cache for the data used in the Session Bean in Session Scope.

I hope, someone can give me a hint, why the Serialization Exception is happening.

Thanks for any help

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