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Questions tagged [leapsecond]

9 questions
363
votes
5 answers

Anyone else experiencing high rates of Linux server crashes during a leap second day?

*NOTE: if your server still has issues due to confused kernels, and you can't reboot - the simplest solution proposed with gnu date installed on your system is: date -s now. This will reset the kernel's internal "time_was_set" variable and fix the…
Bron Gondwana
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10
votes
1 answer

Linux ntpd leap second preparation

There will be a leap second on June 30, 2015 at 23:59:60 UTC. I have a Linux based stratum 1 NTP server which uses GPS as a reference clock. The server is using the "default" ntp.org ntpd. How should I prepare for the leap second to ensure that the…
snap
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5
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2 answers

How to fix leap second sleep issue without reboot

I found that after the latest leap second insertion (2016-12-31 23:59:60), our CentOS7 application that has worker threads sleeping for 1 second between jobs, started to wake the sleeping threads immediately instead of in a second. In general, all…
amosk
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5
votes
2 answers

How do I configure a Unix system to run on TAI time?

I want to configure a Unix system to run on International Atomic Time (TAI) in order to be able to see the year-end leap second properly reported as 2016-12-31 23:59:60. I know this will cause the system's timestamps to be incompatible with POSIX…
Diomidis Spinellis
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4
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1 answer

Leap-second flag not forwarded to NTP clients

I'm making some tests with leapfile feature on ntpd to send fake leap-seconds and ensure our Linux platform is resilient to the "bug". The NTP lab is quite simple: a "master" server with local clock running ntpd with leapfile feature, and a "client"…
santisaez
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3
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0 answers

Leap second addition in linux - how to make sure kernel detects it correctly

For the upcoming leap second addition on June 30 I have been working on making sure the Red Hat Linux detects the time smoothly. I have installed the updated tzdata and ntpd package on all RHEL5 and RHEL6 Servers. I have then ran the leap second…
sandeep.s85
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3
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3 answers

Fit-PC bricked due to leap second, how to prevent the second one from failing?

I've got three Fit-PCs in use. They are being used as light-weight Linux servers. Unfortunately, on Jun 30, the first of them failed to start due to the leap-second bug. I tried rebooting it a few times, but the screen remained blank after the third…
User402841
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2
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2 answers

How to configure NTP has a TAI or GPS time reference?

For our project, we would like to have all servers and systems synchronised to a linear time reference (without leap second). Therefore, we would discard UTC but are very interested in advertising TAI time (or GPS time). Our time server will be…
Huygens
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0
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0 answers

Can I force a re-read of the leap-seconds file immediately?

After realizing that my leap-seconds file is expired, I updated it. However while ntpq indicates expire=202112280000, it did not re-read the current file. I suspect that the file is being checked once per day only. Thus the question is there a ntpq…
U. Windl
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