SOAP reference binding cannot access BASIC/NTLM-protected WSDL getting 401 response code

Issue

• We have been trying to invoke SOAP service through FSW. The scenario is that we read message from a file and want to pass that message to SAP WS.
• The problem we face is that we are not able to pass authentication credentials which are required for WS invocation and interface deployment fails with errors.
• The credentials provided inside <soap:basic> element are not used during authentication and we get the errors as follows:

12:26:35,919 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-8) MSC000001: Failed to start service jboss.deployment.unit."myapp-0.0.1-SNAPSHOT.jar".SwitchYardService: org.jboss.msc.service.StartException in service jboss.deployment.unit."myapp-0.0.1-SNAPSHOT.jar".SwitchYardService: org.switchyard.component.soap.WebServiceConsumeException: javax.wsdl.WSDLException: WSDLException: faultCode=OTHER_ERROR: SWITCHYARD035405: Unable to read WSDL at http://sap.example.com:8000/sap/bc/srt/wsdl/srvc_xxxxx/wsdl11/allinone/standard/document?sap-client=100: java.io.IOException: Server returned HTTP response code: 401 for URL: http://sap.example.com:8000/sap/bc/srt/wsdl/srvc_xxxxx/wsdl11/allinone/standard/document?sap-client=100
    at org.switchyard.as7.extension.services.SwitchYardService.start(SwitchYardService.java:80)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.4.GA-redhat-1.jar:1.0.4.GA-redhat-1]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.4.GA-redhat-1.jar:1.0.4.GA-redhat-1]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_55]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_55]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_55]
Caused by: org.switchyard.component.soap.WebServiceConsumeException: javax.wsdl.WSDLException: WSDLException: faultCode=OTHER_ERROR: SWITCHYARD035405: Unable to read WSDL at http://sap.example.com:8000/sap/bc/srt/wsdl/srvc_xxxxx/wsdl11/allinone/standard/document?sap-client=100: java.io.IOException: Server returned HTTP response code: 401 for URL: http://sap.example.com:8000/sap/bc/srt/wsdl/srvc_xxxxx/wsdl11/allinone/standard/document?sap-client=100
    at org.switchyard.component.soap.OutboundHandler.doStart(OutboundHandler.java:211)
    at org.switchyard.deploy.BaseServiceHandler.start(BaseServiceHandler.java:60)
    at org.switchyard.deploy.internal.Deployment.deployReferenceBindings(Deployment.java:310)
    at org.switchyard.deploy.internal.Deployment.start(Deployment.java:143)
    at org.switchyard.as7.extension.deployment.SwitchYardDeployment.start(SwitchYardDeployment.java:101)
    at org.switchyard.as7.extension.services.SwitchYardService.start(SwitchYardService.java:73)
    ... 5 more
Caused by: javax.wsdl.WSDLException: WSDLException: faultCode=OTHER_ERROR: SWITCHYARD035405: Unable to read WSDL at http://sap.example.com:8000/sap/bc/srt/wsdl/srvc_xxxxx/wsdl11/allinone/standard/document?sap-client=100: java.io.IOException: Server returned HTTP response code: 401 for URL: http://sap.example.com:8000/sap/bc/srt/wsdl/srvc_xxxxx/wsdl11/allinone/standard/document?sap-client=100
    at org.switchyard.component.soap.util.WSDLUtil.readWSDL(WSDLUtil.java:152)
    at org.switchyard.component.soap.OutboundHandler.doStart(OutboundHandler.java:100)
    ... 10 more
Caused by: java.io.IOException: Server returned HTTP response code: 401 for URL: http://sap.example.com:8000/sap/bc/srt/wsdl/srvc_xxxxx/wsdl11/allinone/standard/document?sap-client=100
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1626) [rt.jar:1.7.0_55]
    at java.net.URL.openStream(URL.java:1037) [rt.jar:1.7.0_55]
    at org.switchyard.component.soap.util.WSDLUtil.readWSDL(WSDLUtil.java:143)
    ... 11 more

• The reference binding of the switchyard.xml looks like this:

    <sca:reference name="SapServiceOut" multiplicity="0..1" promote="Route/SapServiceOut">
      <sca:interface.java interface="com.example.switchyard.myapp.SapServiceOut"/>
      <soap:binding.soap name="soap1">
        <soap:contextMapper/>
        <soap:wsdl>http://sap.example.com:8000/sap/bc/srt/wsdl/srvc_xxxxx/wsdl11/allinone/standard/document?sap-client=100</soap:wsdl>
        <soap:wsdlPort>binding</soap:wsdlPort>
        <soap:endpointAddress>http://sap.example.com:8000/sap/bc/srt/rfc/sap/xxxxx/100/service/binding</soap:endpointAddress>
        <soap:basic>
          <soap:user>sap_user</soap:user>
          <soap:password>Password</soap:password>
        </soap:basic>
      </soap:binding.soap>
    </sca:reference>