Cannot create dispatch object using EPR based javax.xml.ws.Service.createDispatch methods

Cannot create dispatch objects using javax.xml.ws.Service methods:
public <T> Dispatch<T> createDispatch(EndpointReference endpointReference, Class<T> type, Service.Mode mode, WebServiceFeature... features)
public Dispatch<Object> createDispatch(EndpointReference endpointReference, JAXBContext context, Service.Mode mode, WebServiceFeature... features)

Detailed stack trace:
—
javax.xml.ws.WebServiceException: Cannot find port: null
at org.jboss.ws.core.jaxws.spi.ServiceDelegateImpl.getEndpointMetaData(ServiceDelegateImpl.java:341)
at org.jboss.ws.core.jaxws.spi.ServiceDelegateImpl.createDispatch(ServiceDelegateImpl.java:323)
at org.jboss.ws.core.jaxws.spi.ServiceDelegateImpl.createDispatch(ServiceDelegateImpl.java:495)
at javax.xml.ws.Service.createDispatch(Service.java:444)
at org.jboss.test.ws.jaxws.jbws2937.JBWS2937TestCase.testCreateDispatchUsingEPRAndSource(JBWS2937TestCase.java:106)