From: Franck Martin
We noticed several ntp servers tried to insert a leap second on 31st
December 2012.
There was no leap second insertion scheduled for that date.
http://en.wikipedia.org/wiki/Leap_second#Insertion_of_leap_seconds and
ftp://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat
The linux kernel seems to still have bugs regarding this, that ripples in
user space.
http://it.slashdot.org/story/12/07/01/1920217/leap-second-bug-causes-crashes
which lead then to a high power usage in some data centers:
http://www.datacenterknowledge.com/archives/2012/07/03/hosts-leap-second-caused-spike-power-usage/
Nevertheless, why so many ntp servers tried to insert a leap second?
PS: Will we have to call John MacClane
(http://en.wikipedia.org/wiki/Live_Free_or_Die_Hard#Plot) in June 2013? ;)
=======================================================
Franck, did you happen to notice which version of NTP those servers were
running? Current versions of NTP require a majority vote before adding a
leap-second, whereas earlier versions only needed one server's flag set to
mark a leap-second. I recall this is from a few years back, now, though.
The Windows, FreeBSD and Linux systems here were unaffected, and are all
running a recent development branch of NTP.
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: [email protected]
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