[Pool] Leap second at end of June 2015

Koos van den Hout koos at idefix.net
Tue Jan 6 09:03:26 UTC 2015


Quoting Matt Wagner who wrote on Mon 2015-01-05 at 22:24:

> On Mon, Jan 5, 2015 at 9:13 AM, Koos van den Hout <koos at idefix.net> wrote:
> >
> > Quoting Martin Radford who wrote on Mon 2015-01-05 at 14:01:
> >
> > > There will be a leap second at the end of June 2015....
> > >
> > > http://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat
> >
> > And relevant to the leap-seconds file in ntpd: it seems to me that file
> > is only updated nearly two months after the IERS announcement.
> >
> > If the first one on this list to spot it could share that!
> 
> It appears to be up already: ftp://time.nist.gov/pub/leap-seconds.3629404800

Interesting setup: when I connected with an ipv4-only ftp client it wasn't
there, with lynx ftp://[2610:20:6f15:15::27]/pub/leap-seconds.3629404800 it
is there. Confusing.

Copied as http://koos.home.xs4all.nl/leap-seconds.3629404800

$ host time.nist.gov
time.nist.gov is an alias for ntp1.glb.nist.gov.
ntp1.glb.nist.gov has address 128.138.141.172
ntp1.glb.nist.gov has IPv6 address 2610:20:6f15:15::27
ntp1.glb.nist.gov has IPv6 address 2610:20:6b01:4::162

128.138.141.172 doesn't have the new file
2610:20:6f15:15::27 does have the new file
2610:20:6b01:4::162 doesn't respond to me at the moment

That last address goes away when I ask it a few times, DNS TTL is quite low.

> It occurs to me that there ought to be a better way of handling this than
> making
> sure stratum 1 operators manually retrieve a file from an FTP server and
> apply
> it to their servers. It seems like the NTP protocol handles this properly
> where its
> upstreams indicate it, but expecting all the stratum 1 operators to get
> this right
> seems like it's asking for trouble.

At least the new ntpd 4.2.8 starts complaining that the leap second file is
about to expire. One step in the good direction.

                                                 Koos van den Hout

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