The following exception is reported on an invalid message: -

14:46:03,958 ERROR [SOAPFaultHelperJAXWS] SOAP request exception
java.lang.ClassCastException: org.jboss.ws.core.soap.TextImpl cannot be cast to org.jboss.ws.core.soap.SOAPElementImpl
at org.jboss.ws.core.CommonSOAPBinding.getParameterFromMessage(CommonSOAPBinding.java:896)
at org.jboss.ws.core.CommonSOAPBinding.unbindRequestMessage(CommonSOAPBinding.java:363)
at org.jboss.ws.core.server.ServiceEndpointInvoker.invoke(ServiceEndpointInvoker.java:197)
at org.jboss.wsf.stack.jbws.RequestHandlerImpl.processRequest(RequestHandlerImpl.java:503)
at org.jboss.wsf.stack.jbws.RequestHandlerImpl.handleRequest(RequestHandlerImpl.java:300)
at org.jboss.wsf.stack.jbws.RequestHandlerImpl.doPost(RequestHandlerImpl.java:208)

The ClassCastException is causing the correct exception to be missed: -

if (soapContentElement == null && optional == false)
throw new WSException("Cannot find child element: " + xmlName);