private static Map<String, String> createStatusMsg() {
    HashMap<String, String> res = new HashMap<String, String>();
    res.put("status", "ok");
    res.put("version", VERSION);

    return Collections.unmodifiableMap(res);
  }
The list of supported return formats.  Always json.
hcatalog/webhcat/svr/src/main/java/org/apache/hive/hcatalog/templeton/Server.java