See jsr-181 4.2

The expected wsdl is something like

<portType name="MyWebService">
<operation name="echoString"/>
<input message="echoString"/>
<output message="echoStringResponse"/>
</operation>
</portType>

<binding name="PingServiceHttpSoap">
<operation name="echoString">
<soap:operation soapAction="urn:EchoString"/>
</operation>
</binding>

The actual generated WSDL is

<definitions name="MyWebServiceService" targetNamespace="http://webmethod.jsr181.ws.test.jboss.org/jaws" xmlns:tns="http://webmethod.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="MyWebService_echoResponse">
<part name="result" type="xsd:string"/>
</message>
<message name="MyWebService_noWebMethod">
<part name="String_1" type="xsd:string"/>
</message>
<message name="MyWebService_noWebMethodResponse">
<part name="result" type="xsd:string"/>
</message>
<message name="MyWebService_echo">
<part name="String_1" type="xsd:string"/>
</message>
<portType name="MyWebService">
<operation name="echo" parameterOrder="String_1">
<input message="tns:MyWebService_echo"/>
<output message="tns:MyWebService_echoResponse"/>
</operation>
<operation name="noWebMethod" parameterOrder="String_1">
<input message="tns:MyWebService_noWebMethod"/>
<output message="tns:MyWebService_noWebMethodResponse"/>
</operation>
</portType>
<binding name="MyWebServiceBinding" type="tns:MyWebService">
<soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
<operation name="echo">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal" namespace="http://webmethod.jsr181.ws.test.jboss.org/jaws"/>
</input>
<output>
<soap:body use="literal" namespace="http://webmethod.jsr181.ws.test.jboss.org/jaws"/>
</output>
</operation>
<operation name="noWebMethod">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal" namespace="http://webmethod.jsr181.ws.test.jboss.org/jaws"/>
</input>
<output>
<soap:body use="literal" namespace="http://webmethod.jsr181.ws.test.jboss.org/jaws"/>
</output>
</operation>
</binding>
<service name="MyWebServiceService">
<port name="MyWebServicePort" binding="tns:MyWebServiceBinding">
<soap:address location="http://TDDELL:8080/jbossws-jsr181-webmethod/TestService"/>
</port>
</service>
</definitions>