dovecot - Oct 2014 - Dovecot Master/Master Replication Problem

Hi,

I've set up 2 servers with dovecot 2.2.9 using maildir using structure: 
/var/maildir/domain/localpart
Server A:    mx1.xxx.de
Server B:    mx2.xxx.de

Mails are delivered to dovecot only on server A by exim4/dovecot deliver

replication to Server B works immediatelly:
mark mail as read on server A, mail is marked as read on server B.

BUT: when i mark a mail as read on Server B, noting happens.
On Server A I get messages like this in dovecot-error.log:

2014-10-22 22:35:05 dsync-server(localpart at domain.de): Error: 
stat(/var/maildir/domain.de/localpart/.dovecot-sync.lock/tmp) failed: 
Not a directory
2014-10-22 22:35:05 dsync-server(localpart at domain.de): Error: Failed to 
access mailbox dovecot-sync.lock: Internal error occurred. Refer to 
server log for more information. [2014-10-22 22:35:05]

I googled a bit, this could habben if there is a file 
".dovecot-sync.lock" in the maildir, but I've double checked that,
there
is no such file...
Why does it work in one direction, but not in the other?

Please help

best regards
Felix

On 22 Oct 2014, at 13:43, Felix Amler <felix at fuqu.me> wrote:
> 2014-10-22 22:35:05 dsync-server(localpart at domain.de): Error:
stat(/var/maildir/domain.de/localpart/.dovecot-sync.lock/tmp) failed: Not a
directory
> 2014-10-22 22:35:05 dsync-server(localpart at domain.de): Error: Failed to
access mailbox dovecot-sync.lock: Internal error occurred. Refer to server log
for more information. [2014-10-22 22:35:05]
Ideally don't use home dir = maildir.
http://wiki2.dovecot.org/VirtualUsers/Home
> I googled a bit, this could habben if there is a file
".dovecot-sync.lock" in the maildir, but I've double checked that,
there is no such file...
> Why does it work in one direction, but not in the other?
Set maildir_stat_dirs=yes or change the home.