[ntp:questions] Spurious leap second
David J Taylor
david-taylor at blueyonder.not-this-bit.nor-this-bit.co.uk
Mon Oct 1 05:54:29 UTC 2007
Folks,
Just for interest, one of my PCs started going wild on its timekeeping
just after midnight. It seems that one or more of the servers it was
synched to has sent leap-second announcements for 2007-Oct-01. Having
inserted the leap-second, the time keeping oscillated from the correct
second to the sprurious second, and a very high value became set in the
drift file (494 instead of about -70). I don't know which server caused
this (possibly in the pool). Stopping NTP, resetting the drift file value
to -72, and restarting NTP seems to have fixed the problem, and none of
the servers now selected shows a 1 second offset. See:
http://www.david-taylor.myby.co.uk/mrtg/bacchus_ntp.html
Some of the other NTP clients seem to have experienced a slight glitch at
the same time or slightly later as well, but kept their head.
http://www.david-taylor.myby.co.uk/mrtg/daily_ntp.html
Cheers,
David
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