[named] Failed to start Berkeley Internet Name Domain (DNS)

# systemctl start named-chroot
Job for named-chroot.service failed because the control process exited with error code.
See "systemctl status named-chroot.service" and "journalctl -xeu named-chroot.service" for details.

  named-chroot 서비스가 문제가 있어서 시작되지 못했음을 알리고 있다.

  아래는 "systemctl status named-chroot.service" 또는 "journalctl -xeu named-chroot.service"로 본 로그 내용이다.

░░ Subject: Unit process exited
░░ Defined-By: systemd
░░ Support: https://wiki.almalinux.org/Help-and-Support
░░
░░ An ExecStartPre= process belonging to unit named-chroot.service has exited.
░░
░░ The process' exit code is 'exited' and its exit status is 1.
May 02 09:00:40 KR-D1 systemd[1]: named-chroot.service: Failed with result 'exit-code'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support: https://wiki.almalinux.org/Help-and-Support
░░
░░ The unit named-chroot.service has entered the 'failed' state with result 'exit-code'.
May 02 09:00:40 KR-D1 systemd[1]: Failed to start Berkeley Internet Name Domain (DNS).
░░ Subject: A start job for unit named-chroot.service has failed
░░ Defined-By: systemd
░░ Support: https://wiki.almalinux.org/Help-and-Support
░░
░░ A start job for unit named-chroot.service has finished with a failure.
░░
░░ The job identifier is 1116 and the job result is failed.

  "Failed to start Berkeley Internet Name Domain (DNS)."는 /var/named의 zone 파일이 없거나 문제가 있으면 나타날 수 있다.

  ???.zone 파일을 ???.zone.a라고 이름을 바꾸어도 이 오류가 나올 수 있다.