By way of comparison I'll add the following: glassfish swallows any SOAPFaultException thrown by the implementation of an @Oneway method and does not generate a client side exception CXF notifies the error by returning a 500 code error to the http client. This results in the JaxWS proxy throwing an exception View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4089187#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...