Since this is really a Sun bug and they refuse to fix it, the only other fix would be to not put non-serializable objects in the Descriptor. This occurs mostly due the attribute caching when using an XMBean, so we could disable attribute caching in those descriptors we provide? e.g. | <descriptors> | <currencyTimeLimit>-1</currencyTimeLimit> | </descriptors> | or just remove the attribute caching by default (it is optional in the spec) i.e. don't install the attribute interceptor unless there is an explicit currencyTimeLimit descriptor. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4129072#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...