See jsr-181 4.3

The expected wsdl is something like

<definitions>
<message name="ping"/>
<portType name="PingService">
<operation name="ping">
<input message="ping"/>
</operation>
</portType>
</definitions>

The actual generated WSDL is

<definitions name="PingServiceService" targetNamespace="http://oneway.jsr181.ws.test.jboss.org/jaws" xmlns:tns="http://oneway.jsr181.ws.test.jboss.org/jaws" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns="http://schemas.xmlsoap.org/wsdl/">
<types>
</types>
<message name="PingService_ping">
</message>
<message name="PingService_pingResponse">
</message>
<portType name="PingService">
<operation name="ping">
<input message="tns:PingService_ping"/>
<output message="tns:PingService_pingResponse"/>
</operation>
</portType>
<binding name="PingServiceBinding" type="tns:PingService">
<soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
<operation name="ping">
<soap:operation soapAction=""/>
<output>
<soap:body use="literal" namespace="http://oneway.jsr181.ws.test.jboss.org/jaws"/>
</output>
</operation>
</binding>
<service name="PingServiceService">
<port name="PingServicePort" binding="tns:PingServiceBinding">
<soap:address location="http://TDDELL:8080/jbossws-jsr181-oneway/TestService"/>
</port>
</service>
</definitions>