Error calling an external service from composite: oracle.fabric.common.FabricInvocationException: Unable to find the WSDL service defined for service name

I want to share an error that has kept me busy for a bit. I could not find the cause of the error easily, but as always with troubleshooting: afterwards it all made sense.

So I had an SOA composite calling an external service. Invoking this service resulted in the error below. This happened after deploying the service in my test environment.

      <bpelFault>
        <faultType>0</faultType>
         <remoteFault xmlns="http://schemas.oracle.com/bpel/extension">
           <part name="summary">
              <summary>oracle.fabric.common.FabricInvocationException: Unable to find the WSDL service defined for service name {http://www.stellent.com/GetCaseNumberWCC/}GetCaseNumberWCC.  Please make sure that the port attribute for the binding defined in the composite file is correct by checking the namespace and service name in the #wsdl.endpoint element. In addition, check that the WSDL associated with the binding namespace is imported and currently reachable (check the import nodes at the top of the composite file). Finally, validate any HTTP proxy settings for the server.</summary>
           </part>
            <part name="code">
              <code>null</code>
            </part>
           <part name="detail">
              <detail>Unable to find the WSDL service defined for service name {http://www.stellent.com/GetCaseNumberWCC/}GetCaseNumberWCC.  Please make sure that the port attribute for the binding defined in the composite file is correct by checking the namespace and service name in the #wsdl.endpoint element. In addition, check that the WSDL associated with the binding namespace is imported and currently reachable (check the import nodes at the top of the composite file). Finally, validate any HTTP proxy settings for the server.</detail>
           </part>
         </remoteFault>
       </bpelFault>

It didn’t make sense to me as the external service was up and running and I could call it from SoapUI. The endpoint looked good and I could view the WSDL in my browser. I checked my composite as the text in the exception suggested, but it looked fine and in accordance with my WSDL:

The SOA service worked fine in my development environment but failed in my test environment. It lead me to the configuration plan I generated using jDeveloper. In the reference part I changed the location to my test environment, the rest I had left untouched.

When I viewed the WSDL in my browser (http://tstenvironment:80/default/WCC/Services/GetCaseNumberWcc/V1?wsdl) I saw the following:

Apparently the service and port names were different in OSB, so it made sense that the port attribute wasn’t updated correctly in the configuration plan. This caused the invocation of the service to throw an error about the service name. I corrected the configuration plan (see yellow underlined text), redeployed the composite and it resolved my problem!

In my case the error was caused by a wrong service name and port generated in the configuration file. But while looking for a solution I saw that this error could also be caused by using version specific abstract WSDL’s or the WSDL location in your composite.xml pointing to the wrong destination (for example your local machine). If you’re using an MDS make sure it is in sync with the target MDS.