root@os:~# timedatectl show-timesync --all
LinkNTPServers=
SystemNTPServers=
ServerAddress=2001:4860:4806:c::
RootDistanceMaxUSec=5s
PollIntervalMinUSec=32s
PollIntervalMaxUSec=34min 8s
PollIntervalUSec=8min 32s
Frequency=0
root@os:~# journalctl -f -u systemd-timesyncd
-- Journal begins at Fri 2021-08-06 14:41:00 UTC. --
Aug 06 15:42:37 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full
Aug 06 15:42:37 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full
Aug 06 15:44:45 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full
Aug 06 15:44:45 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full
Aug 06 15:44:45 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full
Aug 06 15:44:45 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full
Aug 06 15:49:01 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full
Aug 06 15:49:01 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full
Aug 06 15:49:02 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full
Aug 06 15:49:02 things5os systemd-timesyncd[795]: Error receiving message, disconnecting: Exchange full