public static Hive getWithFastCheck(HiveConf c) throws HiveException {
    return getWithFastCheck(c, true);
  }
Same as {@link #get(HiveConf)}, except that it checks only the object identity of existing
MS client, assuming the relevant settings would be unchanged within the same conf object.
ql/src/java/org/apache/hadoop/hive/ql/metadata/Hive.java