Hi Frank,
> Backend (target):
> <1648127910<6 Append {13+}
> group.fritest (\Seen $Label4 NonJunk) "23-Mar-2022 19:55:11 +0100" {3129+}
> Return-Path: …
> >1648127910>6 OK* [APPENDUID 1611826992 15]* Completed
> <1648127910<Q01 LOGOUT
> >1648127910>* BYE LOGOUT received
> Q01 OK Completed
I think the problems all stem from here -- notice the APPENDUID on the backend
only has two numbers...
It looks like, when MOVE is moving messages from the local server to a remote
server, they're APPENDed to the remote server, and then the APPENDUID response
from the remote server is used as the COPYUID response back to the client.
This happens here:
https://github.com/cyrusimap/cyrus-imapd/blob/7f17801c814e22ede72368d7dbfa8e6f4bc3f4d0/imap/imapd.c#L6698-L6707
And a similar pattern also happens in imap/imap_proxy.c. I'm not sure which of
these you're hitting, but either way, if the APPENDUID is only two values, then
the COPYUID will also only be two values.
Why is the APPENDUID only two values? Looks like it's supposed to be two
values! https://datatracker.ietf.org/doc/html/rfc4315#section-3 So using it as
the COPYUID response isn't quite right at all. I've opened
https://github.com/cyrusimap/cyrus-imapd/issues/4027 about this.
Cheers,
ellie
On Fri, 8 Apr 2022, at 2:16 AM, Frank Richter wrote:
> Hello,
> unfortunately we'e facing ongoing problems after migration from 2.4 tu 3.2.9
> (first try was the 3.2.6. Debian 11 package).
> Our setup: traditional murder: 2 frontends, MUPDATE, 2 backend servers.
>
> I can reproduce bugs with MOVE when 2 different backend servers are involved
> – even now with Thunderbird (alpine always uses COPY then \Deleted).
> The problem seems to be with MOVE.
>
> So I disabled MOVE, and XMOVE with this in /etc/imapd.conf
> suppress_capabilities: MOVE XMOVE
>
> We're watching this now … Has anybody seen similar problems?
>
> Thanks,
> Frank
>
> Am 24.03.22 um 14:48 schrieb Frank Richter:
>>
>>
>> Hello,
>> we have a traditional murder (frontend with 2 backend servers –
>> cyrus-imapd-3.2.6-Debian-3.2.6-2+deb11u1).
>> We use shared folder (group namesapce).
>> Moving e-mails between folders on different backend servers (from backend1
>> to backend2) works with Thunderbird, alpine etc. With Horde Webmail there is
>> an error, see below.
>>
>>
>> IMAP logs:
>>
>>
>>
>> OK:
>>
>> Frontend:
>> <1648127917<6 UID MOVE 855056 group.fritest2
>> >1648127917>* *OK [COPYUID 1647952540 855056 11] Completed*
>>
>> Backend (same source and target)
>> <1648127917<6 UID Move 855056 {14+}
>> >1648127917>* OK [COPYUID 1647952540 855056 11] Completed
>>
>> NOT OK:
>> Frontend:
>> <1648127910<6 UID MOVE 855054 group.fritest
>> >1648127910>6 *OK [COPYUID 1611826992 15] Completed*
>>
>> Backend (source):
>> <1648127910<6 Uid Fetch 855054 (Flags Internaldate)
>> >1648127910>* 1981 FETCH (FLAGS (\Seen $Label4 NonJunk) UID 855054
>> >INTERNALDATE "23-Mar-2022 19:55:11 +0100")
>> 6 OK Completed (0.000 sec)
>> <1648127910<PROXY2 Uid Fetch 855054 (Rfc822.peek)
>> >1648127910>* 1981 FETCH (UID 855054 RFC822 {3129}
>> Return-Path: …
>> PROXY2 OK Completed (0.000 sec)
>>
>> Backend (target):
>> <1648127910<6 Append {13+}
>> group.fritest (\Seen $Label4 NonJunk) "23-Mar-2022 19:55:11 +0100" {3129+}
>> Return-Path: …
>> >1648127910>6 OK [APPENDUID 1611826992 15] Completed
>> <1648127910<Q01 LOGOUT
>> >1648127910>* BYE LOGOUT received
>> Q01 OK Completed
>>
>>
>> So the responses on COPYUID are different.
>>
>> When moving between different backend servers, Horde Webmail throws warnings
>> and errors in its log file:
>>
>> 2022-03-24T14:18:30 WARNING: HORDE: [imp] PHP ERROR: array_combine(): Both
>> parameters should have an equal number of elements [pid 64686 on line 4905
>> of "/usr/share/pear/Horde/Imap/Client/Socket.php"]
>>
>> PHP source is:
>>
>>
>>
>> case 'COPYUID':
>>
>>
>> // Defined by RFC 4315
>> // *COPYUID: [0] = UIDVALIDITY, [1] = UIDFROM, [2] = UIDTO*
>> $pipeline->data['copyuid'] = array_combine(
>> $this->getIdsOb($rc->data[1])->ids,
>> $this->getIdsOb($rc->data[2])->ids
>> );
>>
>>
>>
>> So the IMAP client in Horde expects 3 values for COPYUID response (and
>> doesn't handle if there are 2 values only – it throws errors in the
>> following processing).
>>
>> Is cyrus-imapd wrong in this case returning 2 values only (missing the
>> source UID of the moved message)?
>>
>>
>>
>>
>> Thanks,
>> Frank
>>
>>
>>
>>
>> --
>> Chemnitz University of Technology, Germany
>>
>>
> en 62 | R. B302A
> 09111 Chemnitz
> Germany
>
> Tel: +49 371 531 31879
> [email protected]
> www.tu-chemnitz.de/urz
>
>
> *Attachments:*
> * smime.p7s
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