On 6 Feb 2020, at 10:09, Christophe Trefois <trefex(a)gmail.com>
wrote:
Dear @William
Thank you a lot for this nice answer and explanations.
We did update and harmonise the ntp server of all 8 FreeIPA servers that we have and
continued to see a lot of these errors above over the next couple weeks.
However, since 10 days ago, all messages of this sort stopped and have not yet returned.
Is there some catch up mechanism that somehow was able to "heal" ?
Yes, there is a clock-skew stored on the servers, but over time if the NTP is now correct
it "drifts back" to reality.
Imagine it that the CSN lamport clock is "in the future" and always has to
advance, but if it advances just a bit "slowly", eventually NTP/system clocks
will catch up, and they'll get back to normal.
Does that make sense?
Happy to have helped, and glad the issue has been resolved!
Thanks a lot for your insights,
Christophe
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Sincerely,
William Brown
Senior Software Engineer, 389 Directory Server
SUSE Labs