It's a stupid error message, it means it can't use some part of your object because it is defined using interfaces without any idea of implementation. The reason is this in AbstractKernelDeployment (look at the stacktrace of your message) | public List<KernelControllerContext> getInstalledContexts() | { | return installedContexts; | } | There's two ways to fix it. 1) You mark either the getter or setter as @XmlTransient 2) You do like is done on AbstractKernelDeployment and list the properties you want to explicity include in the xml | @XmlType(propOrder={"annotations", "classLoader", "beanFactories", "create", "start", "stop", "destroy", "aliases"}) | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4131157#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...