[ntp:questions] Leap second preparedness

A C agcarver+ntp at acarver.net
Sun Jul 1 06:43:18 UTC 2012


On 6/30/2012 17:09, A C wrote:
> It appears that my system did not respond well to the leap second.
>
> The GPS has not yet received the leap second notification via the
> satellites (it is currently still reporting an offset of 15 seconds).
> The leap second was inserted by ntpd according to the leap file and then:
>
>[snip]
>
> Previously the Internet servers were only a few milliseconds offset but
> SHM(0) showed +1030 or so seconds offset.

The GPS finally recovered, reporting the new offset almost eight hours 
after the fact.  However, ntpd was not happy with this situation at all 
during that period.  The clock was stepping back and forth by a second 
because the GPS disagreed with five Internet servers.

It has settled down again though it appears that one server I use didn't 
step its own time.  It shows as having a one second offset but that's 
not an issue I have to handle.


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