public void syncFromConf(HiveConf conf) {
    Iterator<Map.Entry<String, String>> iter = conf.iterator();
    while (iter.hasNext()) {
      Map.Entry<String, String> e = iter.next();
      set(e.getKey(), e.getValue());
    }
  }
@return true if HS2 webui query-info cache is enabled
common/src/java/org/apache/hadoop/hive/conf/HiveConf.java