[Dovecot] dsync replication errors

[Timo Sirainen]

On 08 Sep 2015, at 01:16, Gedalya <gedalya at gedalya.net> wrote:
> 
> On 02/17/2013 03:21 AM, Timo Sirainen wrote:
>> Although there's still some mail
>> duplication problem with maildir that doesn't log any errors about it.
>> I'm not sure why that happens.
> 
> While you're around, Timo :-)
> 
> I've had such an issue recently with 2.2.18, using Maildir, where emails were being replicated circularly creating more and more duplicate copies.
> Replication should have been unidirectional in reality since changes were being made on one side only.
> Nothing coherent was being logged. Only "Warning: Maildir /srv/mail/domains/.../Maildir: Expunged message reappeared, giving a new UID .. " appearing on the receiving side.
> Is there any intelligence on the matter, or should I isolate this down and report it from scratch?

dsync bugs usually take a lot of time to debug. Unless there's an easily reproducible way to break it, I try to avoid spending time on it. Also in this case the bug might be in Maildir code instead of dsync code.