private String getTablesForSet(String name) throws IOException {
      try (final BackupSystemTable table = new BackupSystemTable(conn)) {
        List<TableName> tables = table.describeBackupSet(name);

        if (tables == null) {
          return null;
        }

        return StringUtils.join(tables, BackupRestoreConstants.TABLENAME_DELIMITER_IN_COMMAND);
      }
    }
Command requires consistent state of a backup system Backup system may become inconsistent
because of an abnormal termination of a backup session or delete command
@return true, if yes
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupCommands.java