My WSDL is as follows. I use the javax.xml.ws.Service, javax.xml.ws.Dispatch, etc to invoke the service from client side. At the server side the operation is called, but parameter is null. Please help and is URGENT for me. <!--?xml version="1.0" encoding="UTF-8" ?--> - <!-- Published by JAX-WS RI at http://jax-ws.dev.java.net. RI's version is JAX-WS RI 2.1.4-b01-. --> - <!-- Generated by JAX-WS RI at http://jax-ws.dev.java.net. RI's version is JAX-WS RI 2.1.4-b01-. --> - - - - - - - - - - - - Soap message looks like as follows: apenv:Body xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"> Web service operation code: /** * Web service operation */ @WebMethod(operationName = "notificationOpearation") @Oneway public void notificationOpearation(@WebParam(name = "Notification") Notification notification) { HotelProcess.getInstance().notify(notification); }