I'm facing some problem in the JAX-RS extension for the CXF. I'm already know that the CXF filter is doing a explicit OutputStream.flush() on the response, but not sure whether this affects anything. Although, it is worth to mention that I'm not facing any problems with other implementations. Currently I was able to debug only that the #retrieveResponsePayload() is being called before the payload registration, which cause an exception to be raised.