Hello,

I have a WCF Web Service using wsHttpDualBinding because I need a callback
to Java client.

I read Mr. A.Gupta's blog that if WCF Service uses wsHttpDualBinding for
interop working is not guaranteed.

I also tried to config wsHttpDualBinding in WCF Service Config file as
follows:

<bindings>
 <customBinding>
   <binding name="Binding1">
     <reliableSession />
     <compositeDuplex />
     <oneWay />
     <textMessageEncoding
                    messageVersion="Soap12WSAddressing10"
                    writeEncoding="utf-8" />
     <httpTransport authenticationScheme="Anonymous"
                    bypassProxyOnLocal="false"
                    hostNameComparisonMode="StrongWildcard"
                    proxyAuthenticationScheme="Anonymous"
                    realm=""
                    useDefaultWebProxy="true" />
   </binding>
 </customBinding>
</bindings>

A C# Client works without problems.

But when using Axis client which is a Java Standalone application following
code:

class ClientUtil
{
   public static OMElement getOMElement()
   {
       OMFactory fac = OMAbstractFactory.getOMFactory();
       OMNamespace omNs = fac.createOMNamespace(
               "http://ws.apache.org/axis2/xsd", "ns1");
       OMElement method = fac.createOMElement("Hello", omNs);
       OMElement value = fac.createOMElement("Hello", omNs);
       value.setText("Hello");
       method.addChild(value);
       return method;
   }
}

public class Client
{
   private static EndpointReference targetEPR = new EndpointReference

           ("http://localhost:8000/ServiceMetadata/DuplexService");

   public static void main(java.lang.String args[])
   {
       ServiceClient sender = null;
       try {
           OMElement payload = ClientUtil.getOMElement();
           Options options = new Options();
           options.setTo(targetEPR);
           options.setTransportInProtocol(Constants.TRANSPORT_HTTP);
           options.setUseSeparateListener(true);
           options.setSoapVersionURI(SOAP12Constants.SOAP_ENVELOPE_NAMESPACE_URI);
           //Callback to handle the response
           Callback callback = new Callback() {
               public void onComplete(AsyncResult result)
               {
                   System.out.println(result.getResponseEnvelope());
               }

               public void onError(Exception e)
               {
                   e.printStackTrace();
               }
           };

           //Non-Blocking Invocation
           sender = new ServiceClient();
           sender.engageModule(Constants.MODULE_ADDRESSING);
           sender.setOptions(options);
           sender.sendReceiveNonBlocking(payload, callback);
           //Wait till the callback receives the response.
           while (!callback.isComplete()) {
               Thread.sleep(1000);
           }
           //Need to close the Client Side Listener.
       }
       catch (Exception axisFault)
       {
           axisFault.printStackTrace();
       }

   }

a Timeout error occurs. I have Addressing library in Axis part so that can't
be a issue.

Axis client hangs in while (!callback.isComplete()) loop and Timeout error
occurs.

Can anyone point what could be the problem? I need a callback feature so,
thats why I'm using wsHttpDualBinding.

Thanks