Proxying POJO with simple frontend without specifying namespace throws NPE

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When an endpoint is configured like this:

<cxf:inbound-endpoint address="http://localhost:8088/TestProxy" 
                      synchronous="true" 
                      proxy="true" 
                      endpointName="TestPOJOComponentPort"
                      serviceName="TestPOJOComponent" 
                      wsdlLocation="./TestProxyImpl.wsdl"
/>

If the namespace parameter is not specified, then a NullPointerException is thrown at ProxyServiceConfiguration.getEndpointName() line: 49:

return new QName(getServiceNamespace(), ((Port) definition.getService(
       getServiceFactory().getServiceQName()).getPorts().values().iterator().next()).getName());

This is because definition.getService(getServiceFactory().getServiceQName()) is returning null.

The workaround is to just supply the namespace parameter, like this:

<cxf:inbound-endpoint address="http://localhost:8088/TestProxy" 
                      synchronous="true" 
                      proxy="true" 
                      endpointName="TestPOJOComponentPort"
                      serviceName="TestPOJOComponent" 
                      namespace="http://esi.support.mulesoft.com/"
                      wsdlLocation="./TestProxyImpl.wsdl"
/>

As the NPE is not a friendly error message, we should supply a better error message when the Service cannot be found in the definition. That error message should suggest looking if the namespace parameter is properly configured.