Further info: this whole "time moved forward" thing had a long discussion and 
eventual fix in 2.3:

https://forums.freebsd.org/threads/dovecot-time-moved-forwards.82886/page-2

For the record, how my clock compares with a standard:

> > sntp time.euro.apple.com
> +0.109836 +/- 0.031550 time.euro.apple.com 17.253.14.251

So, first there seems to be a bug in this somewhere since dovecot is clearly 
getting wrong time info. Then this also seems related to dovecot eventually 
crashing on me.

J

> On Feb 10, 2025, at 11:15, John Muccigrosso <muccigro...@icloud.com> wrote:
> 
> After last week's struggle with the new version and my conf file, I got 
> everything working. Now however dovecot crashes on me every few hours.
> 
> The logs show a bunch of this kind of warning, which I find mention of on the 
> internets:
> 
>> Feb 07 15:13:47 imap(58317): Warning: Time moved forward 48.803640 seconds
>> Feb 07 16:30:27 master: Warning: Time moved forward by 694.039203 seconds - 
>> adjusting timeouts.
>> Feb 07 16:52:47 imap(61246): Warning: Time moved forward 293.443011 seconds
>> Feb 07 16:52:47 master: Warning: Time moved forward by 1279.423507 seconds - 
>> adjusting timeouts.
>> Feb 07 17:25:39 imap(61286): Warning: Time moved forward 1942.575589 seconds
>> Feb 07 17:25:39 imap(61288): Warning: Time moved forward 172.563346 seconds
>> Feb 07 17:25:39 master: Warning: Time moved forward by 1912.666999 seconds - 
>> adjusting timeouts.
>> Feb 07 17:49:32 imap(61286): Warning: Time moved forward 1402.761862 seconds
>> Feb 07 17:51:13 master: Warning: Time moved forward by 1473.582569 seconds - 
>> adjusting timeouts.
>> Feb 07 17:51:13 imap(61286): Warning: Time moved forward 70.823888 seconds
>> Feb 07 17:53:07 master: Warning: Time moved forward by 53.843767 seconds - 
>> adjusting timeouts.
>> Feb 07 18:44:22 imap(61286): Warning: Time moved forward 1386.259444 seconds
>> Feb 07 19:11:41 master: Warning: Time moved forward by 615.609964 seconds - 
>> adjusting timeouts.
> 
> Note the very large jump dovecot claims is happening in all of these, up to 
> half an hour, with a minimum of 48 seconds in this bunch. You can see that it 
> even does a pair of these in rapid succession, like at 17:25:39 above, and 
> will do >10 within the space of an hour.
> 
> These seem eventually to be followed by a crash ("eventually" because I'm 
> running this on my laptop which isn't always open and running). The crash log 
> entries all start with something like this:
> 
>> Feb 07 16:17:53 imap(58315): Panic: file ./time-util.h: line 40 
>> (timeval_add_usecs): assertion failed: (usecs >= 0)
> 
> 
> The reports will end with one of these:
> 
>> Feb 06 17:45:07 log(48089): Warning: Killed with signal 15 (by pid=1 uid=0 
>> code=unknown 0)
> 
>> Feb 07 16:17:53 imap(58317): Fatal: master: service(imap): child 58317 
>> killed with signal 6 (core dumps disabled - 
>> https://dovecot.org/bugreport.html#coredumps)
> 
> 
> One more detail, I usually do `sudo brew services start dovecot` to run 
> dovecot and this results in the crashes. When I was testing this on Saturday, 
> I started it with `sudo dovecot -F` instead, so that I would see problems in 
> the terminal. It went all day without crashing and I finally stopped and 
> restarted it with the brew method. That's not a rigorous test, but it is 
> suggestive.
> 
> Happy to provide more info, but I'm hoping this is sufficient to suggest a 
> course of action.
> 
> dovecot 2.4.0 installed via homebrew
> macOS 13.6.9
> 
> J


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