title: JAX-WS endpoint publishing issue with JAXB param in web method
body: <p>I can publish the Endpoint without problems when my one and only web method has a String parameter. But if I change the param to a JAXB class, I always run into a <code>IllegalArgumentException: argument contains null</code>. I generated the JAXB class with the <strong>xjc</strong> tool. I also ran a debugger through it, but I'm not able to figure out where the issue comes from. I only know the issue appears while marshalling process happens. Any idea what it can be or what I can do furthermore?</p>