ServerResponseWriter sets HTTP status 204 even though response was written to HttpServletResponse

@GET
@Path("/data")
public void getData(@Context HttpServletResponse response) {
    response.setStatus(200);
    response.getOutputStream().write(...);
}

@GET
@Path("/data")
public void getData(@Context HttpServletResponse response) {
    response.setStatus(200);
    response.getOutputStream().write(...);
    response.flushBuffer(); // will commit the response
}

if (jaxrsResponse.getEntity() == null || response.getOutputStream() == null)
{
   if (!response.isCommitted())
   {
       // If response is already committed then setting the status/headers has no effect:
       response.setStatus(jaxrsResponse.getStatus());
       commitHeaders(jaxrsResponse, response);
   }
   return;
}