public Path getWhRoot() throws MetaException {
    if (whRoot != null) {
      return whRoot;
    }
    whRoot = getDnsPath(new Path(whRootString));
    return whRoot;
  }
Resolve the configured warehouse root dir with respect to the configuration
This involves opening the FileSystem corresponding to the warehouse root
dir (but that should be ok given that this is only called during DDL
statements for non-external tables).
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/Warehouse.java