@WebServiceProvider returns invalid SOAP response when using CXF

Issue

• When making a request with a CXF client to a CXF endpoint, I get the following error:

Aug 29, 2012 9:56:46 AM org.apache.cxf.phase.PhaseInterceptorChain doDefaultLogging
WARNING: Interceptor for {http://aaa.bbb/soapheader/inband}InBandSoapHeaderService#{http://cio.xyz.com/soapheader/inband}FooCallbackPoll has thrown exception, unwinding now
java.lang.IndexOutOfBoundsException: Index: 4, Size: 4
        at java.util.ArrayList.rangeCheck(ArrayList.java:615)
        at java.util.ArrayList.get(ArrayList.java:393)
        at org.apache.cxf.message.MessageContentsList.get(MessageContentsList.java:79)
        at org.apache.cxf.jaxws.interceptors.HolderInInterceptor.handleMessage(HolderInInterceptor.java:69)
        at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:263)
        at org.apache.cxf.endpoint.ClientImpl.onMessage(ClientImpl.java:795)
        at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponseInternal(HTTPConduit.java:1626)
        at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponse(HTTPConduit.java:1493)
        at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:1401)
        at org.apache.cxf.io.CacheAndWriteOutputStream.postClose(CacheAndWriteOutputStream.java:47)
        at org.apache.cxf.io.CachedOutputStream.close(CachedOutputStream.java:194)
        at org.apache.cxf.transport.AbstractConduit.close(AbstractConduit.java:56)
        at org.apache.cxf.transport.http.HTTPConduit.close(HTTPConduit.java:648)
        at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:62)
        at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:263)
        at org.apache.cxf.endpoint.ClientImpl.doInvoke(ClientImpl.java:531)
        at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:461)
        at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:364)
        at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:317)
        at org.apache.cxf.frontend.ClientProxy.invokeSync(ClientProxy.java:88)
        at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:134)
        at $Proxy27.fooCallbackPoll(Unknown Source)
        at com.aaa.bbb.inbandsh.InBandSHWSSClient.main(InBandSHWSSClient.java:151)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
        at java.lang.reflect.Method.invoke(Method.java:613)
        at org.jboss.modules.Module.run(Module.java:270)
        at org.jboss.modules.Main.main(Main.java:294)

Upon analysis of the response message, it appears the body is empty:

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
   <SOAP-ENV:Header>
      <FooResponseHeader xmlns:ns2="http://cxf.apache.org/soapheader/test">FooResponseHeader</FooResponseHeader>
      <ns2:FooResponse xmlns:ns2="http://cxf.apache.org/soapheader/test">
         <ns2:Return>Foo Response Body</ns2:Return>
      </ns2:FooResponse>
   </SOAP-ENV:Header>
   <SOAP-ENV:Body/>
</SOAP-ENV:Envelope>

Note that the CXF endpoint is implemented as a @WebServiceProvider