public static void createDirectory(MasterFileSystem mfs, NamespaceDescriptor nsDescriptor)
    throws IOException {
    mfs.getFileSystem()
      .mkdirs(CommonFSUtils.getNamespaceDir(mfs.getRootDir(), nsDescriptor.getName()));
  }
Create the namespace directory
@param env          MasterProcedureEnv
@param nsDescriptor NamespaceDescriptor
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/AbstractStateMachineNamespaceProcedure.java