ntpd fails to sync TIME_ERROR: 0x41: Clock Unsynchronized
On Debian 10, ntpd [email protected]
fails to sync with following error:
kernel reports TIME_ERROR: 0x41: Clock Unsynchronize
here's ntp.conf
:
disable monitor
statsdir /var/log/ntpstats
restrict -4 default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
restrict 127.0.0.1
restrict ::1
server 0.us.pool.ntp.org iburst
server 1.us.pool.ntp.org iburst
server 2.us.pool.ntp.org iburst
server 3.us.pool.ntp.org iburst
server 127.127.1.0
fudge 127.127.1.0 stratum 10
restrict 127.127.1.0
driftfile /var/lib/ntp/drift
ntpq -c sysinfo
:
associd=0 status=0614 leap_none, sync_ntp, 1 event, freq_mode,
system peer: 50-205-57-38-static.hfc.comcastbusiness.net:123
system peer mode: client
leap indicator: 00
stratum: 2
log2 precision: -23
root delay: 70.634
root dispersion: 3.569
reference ID: 50.205.57.38
reference time: e3a0c049.c39d770a Wed, Jan 6 2021 23:03:37.764
system jitter: 0.723169
clock jitter: 1.177
clock wander: 0.000
broadcast delay: -50.000
symm. auth. delay: 0.000
ntpq -c lpeers
:
remote refid st t when poll reach delay offset jitter
==============================================================================
LOCAL(0) .LOCL. 10 l 286 64 20 0.000 0.000 0.000
*50-205-57-38-st .GPS. 1 u 19 64 37 70.631 1.618 1.843
-ns1.backplanedn 173.162.192.156 2 u 14 64 37 84.235 -1.575 2.852
+c-73-239-136-18 74.6.168.73 3 u 11 64 37 48.606 1.598 2.522
+time-d.bbnx.net 252.74.143.178 2 u 14 64 37 92.632 0.623 0.799
timedatectl
:
Local time: Wed 2021-01-06 23:06:44 UTC
Universal time: Wed 2021-01-06 23:06:44 UTC
RTC time: Wed 2021-01-06 23:06:44
Time zone: Etc/UTC (UTC, +0000)
System clock synchronized: no
NTP service: inactive
RTC in local TZ: no
Any idea what could be wrong?
Solution 1:
Your clock is syncing fine. The sync_ntp
in your ntpq -c sysinfo
proves that. The kernel messages you're referring to are transient during ntpd
startup and are not anything to be worried about.
The problems I see with your setup:
-
timedatectl
is not reporting time sync correctly. The easy fix for that is not to run it. :-) On one of my servers on the same OS and NTP version,timedatectl
doesn't produce anything useful at all, but instead saysFailed to create bus connection: No such file or directory
, because I don't rundbus
. - I'm surprised your configuration works with pool servers at all, because of the lack of a
restrict source ...
line. - You're using the LOCL clock driver, which has been deprecated for many years.
- Similarly, you don't need
disable monitor
to protect yourself from being used for reflective DDoS - the defaultrestrict
lines handle that.
You should revert to the default Debian /etc/ntp.conf
contents - it will work better than your current configuration and cause you fewer problems when you upgrade. Here's a copy, in case you don't have one handy: http://paste.debian.net/1180011/