static int numOfArgs(String[] args) {
    if (args == null) {
      return 0;
    }

    return args.length;
  }
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