Re: Sequence rollover; local offset updated

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> On 6 Feb 2020, at 10:09, Christophe Trefois <trefex@xxxxxxxxx> 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
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