A 503 will still return a response body, however the root key .ok will have the value false.

The below document shows that there is something wrong with the configured consumers, in this case it is because the number of consumingThreads is not the same as the totalThreads


  {
    "ok": false,
    "consumers": {
      "ok": false,
      "available": 0,
      "ready": 0,
      "errors": 0,
      "consumingThreads": 0,
      "totalThreads": 1
    },
    ...
  }