I suppose that in your equals you invoke getClass. I had the same problem. There is a Wiki on hibernate about equals and hashcode (http://www.hibernate.org/109.html). For my entites, I never invoke getClass, I use a workaround to be sure not to have proxy. That's ugly, but I did not find something more elegant in javassist publi API. | public static Class getBaseClass(Class srcClass) { | if (srcClass.getName().contains(CGLIB) | || srcClass.getName().contains(JAVASSIST)) { | return srcClass.getSuperclass(); | } | return srcClass; | | } View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4071050#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...