title: Result of using ResponseEntity with no return value
body: <p>I use spring boot and it's one of my rest controller</p>
  
  <pre><code>@RequestMapping(value = "/members/{memberId}/creditcard", method = RequestMethod.PUT)
  public ResponseEntity saveCreditCard(@PathVariable("memberId") Long memberId, @RequestBody CreditCardInfoDto creditCardInfo) throws CreditCardException, ResourceNotFoundException {
      paymentService.saveCreditCard(creditCardInfo);
      return new ResponseEntity(HttpStatus.OK);
  }
  </code></pre>
  
  <p>On the client side, I do</p>
  
  <pre><code>jQuery.ajax({
    type: type,
    url: url,
    contentType: "application/json",
    dataType: "json",
    data: data,
    success: function(data, status, jqXHR) {
      if (data) {
      ...
      }
    },
    error: function(jqXHR, status) {
      ...
    }
  });
  </code></pre>
  
  <p>I pass alway by the error section... result it's</p>
  
  <pre><code>qXHR = Object {readyState: 4, responseText: "", status: 200, statusText: "OK"}, status = "parsererror
  </code></pre>
  
  <p>Any idea?</p>