Re: ntp dies after a while....
Den 30/09/2009 kl. 22.51 skrev Rick Thomas:
ok.... so it's a "design feature" ... no big deal... I'll probably
stick with the "-g" option then.....
On Sep 30, 2009, at 4:15 AM, Niels S. Eliasen wrote:
Noticed that after some days(even weeks) ntpd dies for no apparent
Anyone seen this ?
and are there any known fixes ?
from daemon.log I see:
Sep 28 12:49:59 munin ntpd: synchronized to 126.96.36.199,
Sep 28 12:49:59 munin ntpd: time correction of 2295 seconds
exceeds sanity limit (1000); set clock manually to the correct UTC
but as the daemon is running... surely it should correct this
before getting into this "exceeds sanity limit" issue ??
I don't know how the system clock gets so far off from UTC -- maybe
indicative of a hardware problem? Are you, maybe, using anything
besides NTP to set your clock? Maybe one of your servers
(188.8.131.52 springs to mind) is serving bogus time?
In any case, the "step the clock if necessary -- no matter how far
off it may be" ( "-g" option to ntpd) mode is a one-shot to take
care of machines that have lousy (or non-existent) on-board CMOS
clocks. They come up after a reboot with very-wrong or simply
random time. After the time is judged to be in sync, ntp refuses
to step the clock if it's discovered to be outside of the sanity
The logic of this policy is that if the clock is synced, and it
suddenly goes out of sync, there is something terribly wrong, and
the sysadmin needs to get it fixed. Silently stepping the clock by
more than 1000 seconds is not the right thing to do. It could cause
much more harm than good. So the ntpd daemon commits suicide rather
than contribute to a larger problem.
This has been discussed endlessly on the NTP mailing lists. It's a
decision made by Dave Mills himself, and he refuses to change his
It's running on a 400Mhz Tibook ... so it is low-powered....
and although "ntpdate" is run on boot.... the Tibook still loses some
10-13 seconds in between "ntpd" wakes up....
Sep 30 23:04:57 munin ntpd: synchronized to 184.108.40.206,
Sep 30 23:04:57 munin ntpd: time reset +13.062046 s
Sep 30 23:04:57 munin ntpd: kernel time sync status change 4001
Sep 30 23:05:25 munin ntpd: synchronized to 220.127.116.11,
Sep 30 23:05:28 munin ntpd: no servers reachable
Sep 30 23:05:35 munin ntpd: synchronized to 18.104.22.168,
For details, see "man ntpd"
"Ach, crivens, what a wee snotter....."
Quote from "The Wee Free Men" by Terry Pratchett