Dsync issues since 2.3.11.3.

[Reio Remma]

On 28/09/2020 11:00, Reio Remma wrote:
> Hello!
>
> I've started seeing intermittent dsync failures since upgrading 
> Dovecot to 2.3.11.3-3 (CentOS 8 using the official Dovecot repo).
>
> Sep 27 17:49:04 host dovecot[130]: 
> dsync-local(user at host)<5GWFD2CmcF+TJwAAsNnMGQ>: Warning: Failed to do 
> incremental sync for mailbox INBOX, retry with a full sync (Modseq 
> 66543 no longer in transaction log (highest=66547, 
> last_common_uid=46346, nextuid=46347))
> Sep 27 17:49:04 host dovecot[130]: 
> dsync-local(user at host)<5GWFD2CmcF+TJwAAsNnMGQ>: Error: Remote command 
> returned error 75: ssh <options> doveadm dsync-server -u user at host
>
> It seems to happen at random times to random users.
>
> My setup has 2 servers - users are connecting to the main server and 
> the secondary server is just for backup - noone is actually connecting 
> to it. 


For the last few days the problem has been fixated on a specific mailbox.

There are no errors at all in the logs of the secondary server nor any 
further errors on the primary.

Would it be a good idea to run doveadm force-resync on the primary 
server (or both?) for that mailbox?

Thanks,
Reio