Periosically get xntpd message synchronisation lost, should I be concerned?

[Jack C. Mahaffey]

I periodically get 'synchronisation lost' logged by xntpd. Should I be concernted?

jack...

[Sanjay_6 · Accepted solution]

Hi Jack,

As long as the system sync back to the ntp server the sync lost message is okay. Depends on the frequency of this message.

Hope this helps.

Regds

[Christopher McCray_1]

I too get those messages from time to time:Jan 6 14:29:25 dmc29 xntpd[918]: synchronisation lost
Jan 6 14:34:30 dmc29 xntpd[918]: synchronized to 1.2.3.4, stratum=3


You need worry only if you don't get the second message or if the messages flood your syslog.

Hope this helps
Chris

[James R. Ferguson]

Hi Jack:

Yes and no.

If you do 'ntpq -p' the output contains a column titled "offset". This is the number of milliseconds difference between your server's clock and the time source. Technical Knowledge Base document #KBRC00001347 notes that "When this number exceeds 128 then NTP makes a big adjustment (and the message synchronization lost appears in the logfile)."

Regards!

...JRF...

[Jack C. Mahaffey]

I'll also get the second message, it just doesn't flood syslog. It's happens only maybe 10 - 30 times a day.

The second message, for example, "synchronized to nn.nn.nn.nn, stratum=14" may not show up for another 5 or 10 minutes later.

jack...

[John Payne_2]

You are problibly ok...

If you are worried about seeing what kind of jump your server is making, enable the 'driftfile' option. It is listed close to the top of the docs in the ntp.conf file.

[Jack C. Mahaffey]

ntpq -p offset is only around 28, well below 128.

Thanks to all for the feedback.

jack...

[T. M. Louah]

To add to above,
If you are not supposed to be sysncing Time with a Time Server (NTP network time Protocol) you'd probably not to worry.
.. Check Date & time of ur system.
.. Check the battery of real time clock (rtc), it may be low & You lost time when powered off for long time.
G'd luck
t++