dovecot - Jun 2016 - dsync unstable? (other strange detail)

Hi,

I'm trying to migrate from Cyrus (remote side) to Dovecot 2.2.24 (local).
On the local side the destinations folders, and indexes are empty.

The command I'm using is

doveadm \
        -o mail_plugins= \
        -o imapc_master_user=<cyrus-user> \
        -o imapc_password=<cyrus-password> \
        -o imapc_host=<cyrus-ip> \
        \
        -o imapc_ssl_verify=no \
        -o imapc_ssl=imaps \
        -o imapc_port=993 \
        backup -f -u "heiko" -R imapc: \
        || {
                rc=$?
                echo "EXIT: $rc" >&2
                exit $rc
        }

On successive runs of the above command I get:

    dsync(heiko): Warning: Deleting mailbox 'Serververwaltung.Mailinglisten
Anforderung': UID=16 GUID= is missing locally
    EXIT: 75
    dsync(heiko): Warning: Deleting mailbox 'Serververwaltung.Mailman':
UID=2 GUID= is missing locally
    EXIT: 75
    dsync(heiko): Warning: Deleting mailbox
'Serververwaltung.Servermeldungen': UID=514 GUID= is missing locally
    EXIT: 75
    dsync(heiko): Warning: Deleting mailbox
'Serververwaltung.Servermeldungen.AIDE': UID=188292 GUID= is missing
locally
    EXIT: 75 
    dsync(heiko): Warning: Deleting mailbox
'Serververwaltung.Servermeldungen.AIDE.AIDE - 2012': UID=9343 GUID= is
missing locally
    EXIT: 75

Any idea where to look next? Is 'doveadm backup' the wrong tool for such
migration? (I'd say with about 2.2.9 I had similar problems, but at
least it didn't stop at every subfolder.)

    Best regards from Dresden/Germany
    Viele Gr??e aus Dresden
    Heiko Schlittermann
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On 27 Jun 2016, at 08:28, Heiko Schlittermann <hs at schlittermann.de>
wrote:
> 
> Hi,
> 
> I'm trying to migrate from Cyrus (remote side) to Dovecot 2.2.24
(local).
> On the local side the destinations folders, and indexes are empty.
> 
> The command I'm using is
> 
> doveadm \
>        -o mail_plugins= \
>        -o imapc_master_user=<cyrus-user> \
>        -o imapc_password=<cyrus-password> \
>        -o imapc_host=<cyrus-ip> \
>        \
>        -o imapc_ssl_verify=no \
>        -o imapc_ssl=imaps \
>        -o imapc_port=993 \
>        backup -f -u "heiko" -R imapc: \
>        || {
>                rc=$?
>                echo "EXIT: $rc" >&2
>                exit $rc
>        }
> 
> On successive runs of the above command I get:
> 
>    dsync(heiko): Warning: Deleting mailbox
'Serververwaltung.Mailinglisten Anforderung': UID=16 GUID= is missing
locally
This means that on Dovecot side there are messages after UID=16, but either:

a) UID=16 was expunged from Dovecot side or

b) UID=16 suddenly appeared on Cyrus side even though it wasn't there
earlier. This isn't allowed by IMAP standard.

Dovecot can't insert UIDs, so it'll delete the folder and re-sync
everything on the next run.
> Any idea where to look next? Is 'doveadm backup' the wrong tool for
such
> migration? (I'd say with about 2.2.9 I had similar problems, but at
> least it didn't stop at every subfolder.)
If you allow local access already that can do modification, use doveadm sync -1
after that.

Hi,
Timo Sirainen <tss at iki.fi> (Di 28 Jun 2016 23:30:38
CEST):
> > 
> > On successive runs of the above command I get:
> > 
> >    dsync(heiko): Warning: Deleting mailbox
'Serververwaltung.Mailinglisten Anforderung': UID=16 GUID= is missing
locally
> 
> This means that on Dovecot side there are messages after UID=16, but
either:
> a) UID=16 was expunged from Dovecot side or
On the dovecot side nobody is accessing the mail system.
> b) UID=16 suddenly appeared on Cyrus side even though it wasn't there
earlier. This isn't allowed by IMAP standard.
Hm, this seems to be a possible reason.
So, successive numbers?

It seems to happen mostly on huuge mailboxes.
-- 
Heiko
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