Jochen H [https://community.jboss.org/people/Jochus] created the discussion "Re: Passivation error caused by java.lang.ClassNotFoundException: org.jboss.wsf.spi.serviceref.ServiceRefMetaData" To view the discussion, visit: https://community.jboss.org/message/752307#752307 -------------------------------------------------------------- I checked out the source code of JBoss Serialization and I've attached the code to my JBoss installation. Problem seems to be related to a property ResourceBundle which is in my OneaSessionBean. Passivation fails on this property, because this object cannot be serialized ( http://docs.oracle.com/javase/6/docs/api/java/util/ResourceBundle.html http://docs.oracle.com/javase/6/docs/api/java/util/ResourceBundle.html). When I mark it as "transient", the problem seems to be resolved! If you want to know how I got to this solution, please read the following blogpost: http://www.jochus.be/site/2012-08-06/java/debugging-passivation-errors-in... http://www.jochus.be/site/2012-08-06/java/debugging-passivation-errors-in... -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/752307#752307] Start a new discussion in JBoss AOP at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]