Error listenerStart - JaxWS - JBoss as 7 - classpath

Question

I'm trying to migrate a Jax-WS based web service to JBoss as 7 but the application (deployed as a war) failes to start the listener on start-up.
ERROR [org.apache.catalina.core.StandardContext] (MSC service thread 1-14) Error listenerStart
ERROR [org.apache.catalina.core.StandardContext] (MSC service thread 1-14) Context [/abc] startup failed due to previous errors
ERROR [org.jboss.msc.service.fail] (MSC service thread 1-14) MSC000001: Failed to start service jboss.web.deployment.default-host (...)
The error message references to failed due to previous errors however no errors are printed in the log. The application in question bundles jax-ws-rt like this:
<dependency>
<groupId>sun-jaxws</groupId>
<artifactId>jaxws-rt</artifactId>
<version>2.1.7</version>
</dependency>
If I change the scope of the jax-ws-rt to be provided this causes a nice ClassNotFound as expected.
WARN [org.jboss.as.ee] (MSC service thread 1-13) JBAS011006: Not installing optional component com.sun.xml.ws.transport.http.servlet.WSServletContextListener due to exception: java.lang.ClassNotFoundException: com.sun.xml.ws.transport.http.servlet.WSServletContextListener (…)
The servlet is defined like this in the web.xml.
<listener>
<listener-class>com.sun.xml.ws.transport.http.servlet.WSServletContextListener</listener-class>
</listener>
<servlet>
<description>JAX-WS endpoint for data service</description>
<display-name>abc</display-name>
<servlet-name>abc</servlet-name>
<servlet-class>com.sun.xml.ws.transport.http.servlet.WSServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>abc</servlet-name>
<url-pattern>/services/abc</url-pattern>
</servlet-mapping>
I cant understand whats wrong. How do I solve this and get the application deployed?
Thoughts:
Am I missing a dependency?
Can I reconfigure the war to use Jboss internal JaxWS without major refactoring?
If I cant use a jboss internal JaxWS version can I force Jboss to use a version of Jaxws that I bundle in the war? (If so, what dependencies do I need for JaxWs?)

Answer 1

with JBoss AS7 (Java EE6) you actually shouldn't need to put the WSServlet in the web.xml as the servlet-class. But instead you would have there the class name of the class annotated with #Webservice
All you want to do is make sure that in you JBoss configuration (e.g. standalone.xml) you have extension for webservices enabled:
<extensions>
[...]
<extension module="org.jboss.as.webservices"/>
</extensions>