Major Description
The JaxWS clients use the stream object stored as inMessage.setContent(InputStream.class, is) which allows other interceptors to make copies of the returned stream. The JaxRS client however always goes back to the HttpInputStream stored in the HTTPURLConnection object. If you try to make a copy of the stream data you drain the HttpInputStream data and eventually the respose call will fail because the HttpInputStream is empty.
I'ld like to propose a change to get the JaxRS client to always first check to see if a call to inMessage.getContent(InputStream) returns a stream and if not then default back to the HttpURLConnection's HttpInputStream. This will allow other intercpetors to make copies of the stream data.
Patch to follow very soon