"itsjewel" wrote : Isn't this a bug? This was a problem with Java 5 and before, the names assigned to parameters were not retained in the resulting .class files when you compile the class - this means at deployment time it is not possible to obtain the parameter name using reflection. The @WebParam annotation is a workaround to get this information into the compiled .class file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4146148#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...