public static Set<String> getHiddenSet(Configuration configuration) {
    Set<String> hiddenSet = new HashSet<String>();
    String hiddenListStr = HiveConf.getVar(configuration, HiveConf.ConfVars.HIVE_CONF_HIDDEN_LIST);
    if (hiddenListStr != null) {
      for (String entry : hiddenListStr.split(",")) {
        hiddenSet.add(entry.trim());
      }
    }
    return hiddenSet;
  }
Getting the set of the hidden configurations
@param configuration The original configuration
@return The list of the configuration values to hide
common/src/java/org/apache/hadoop/hive/conf/HiveConfUtil.java