dovecot - Sep 2015 - dsync replication errors

On Sat, 2013-02-16 at 19:32 +0100, Oli Schacher wrote:
> There seems to be an issue left when expunging a large amount of
> messages from the Trash. I managed to get it twice so far by expunging
> ~3k messages. I'll try to create a reproducible test script for this
> scenario. I can currently only provide my "clicking around" log
output.
> Version is current hg, e63d1cf19ec7.
> 
> First time it happened:
> Feb 16 18:49:48 doco2 dovecot: imap(user1): Warning: Maildir
/mailstore/user1/maildir/.Trash: Expunged message reappeared, giving a new UID
(old uid=1221, file=1361035457.M728795P6220.doco1,S=2476,W=2555:2,Sa)
These errors should be gone now in hg. 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.
> Feb 16 18:50:14 doco2 dovecot: doveadm: Error: dsync-remote(user1): Error:
dsync(local): Received unexpected input S != H
Fixed also this error that happened on locking failure.
> Feb 16 19:13:08 doco1 dovecot: doveadm: Error: dsync-remote(user1): Panic:
file mail-transaction-log-view.c: line 72 (mail_transaction_log_view_set):
assertion failed: (min_file_seq <= max_file_seq)
Not sure about this one. But usually this happens only once and retry
works.

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?