Can you share how to implement web service client stub as an EJB, generated by sun jwsdp (wscompile) in jboss? My EJB is calling web service to 3rd party provider. The client stub is generated through Sun's jwsdp. However I encountered the following exception: java.lang.ClassCastException: org.jboss.ws.soap.SOAPMessageImpl at com.sun.xml.rpc.client.StubBase._postSendingHook(StubBase.java:231) at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:324) I added the following jar from jwsdp to the lib dir: FastInfoset.jar jaxrpc-impl.jar jaxrpc-spi.jar jsr173_api.jar saaj-impl.jar I am running jboss-4.0.5.GA. How can I resolve the problem? Can the stub generated by jwsdp be used in JBoss or any application other the Sun? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4011153#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...