Re: Migration murder from 3.2 to 3.10 (Debian 11 to 13) – frontend to backend auth error

Hwllo,
thanks for you help. Some minutes ago I changed the setting to 
improved_mboxlist_sort:1 for our 3.2.11 murder:
- stopped cyrus-imapd on frontends, backends, mupdate master.

- on frontends, mupdate master:
mv mailboxes.db mailboxes.db.orig
in /etc/imapd.conf: improved_mboxlist_sort: 1

- on backends:
ctl_mboxlist -d > /tmp/mailboxes.txt
mv mailboxes.db mailboxes.db.orig
in /etc/imapd.conf: improved_mboxlist_sort: 1
ctl_mboxlist -u < /tmp/mailboxes.txt

- on frontend,  mupdate master:  start cyrus-imapd (without lmtp)

- on backends: start cyrus-imapd
from ctl_cyrusdb -r in the log:
Mar  9 06:13:52 porto cyrus/ctl_cyrusdb[1699313]: recovering cyrus databases
Mar  9 06:13:52 porto cyrus/ctl_cyrusdb[1699313]: mbentry user.… has no 
uniqueid, needs reconstruct
Mar  9 06:13:52 porto cyrus/ctl_cyrusdb[1699313]: mbentry user.…had no 
uniqueid, setting e5d5e487-2e4c-4ba4-ba6f-ff7e0a5aac41 from header
for every mailbox / folder.

That’s probably the missing parts from the export as Дилян stated.

After this the mupdate master was populated.
Mar  9 06:15:51 porto cyrus/ctl_cyrusdb[1699313]: done recovering cyrus 
databases
Mar  9 06:15:51 porto cyrus/ctl_mboxlist[1699572]: populating mupdate
Mar  9 06:15:52 porto cyrus/ctl_mboxlist[1699572]: Force Activate: 
user.… for every mailbox/folder

And finally restarted cyrus-imapd on frontends with lmtp

Now I hope the best …

Frank

Am 07.03.26 um 09:56 schrieb Дилян Палаузов:
> Hello,
>
> Regarding improved_mboxlist_sort, the Release notes for 3.6:
>
> • athttps://www.cyrusimap.org/imap/download/release-notes/3.6/x/3.6.0.html state correctly that the option improved_mboxlist_sort is removed (⇔does nothing);
> • athttps://www.cyrusimap.org/3.6/imap/download/release-notes/3.6/x/3.6.0.html do not state that the option improved_mboxlist_sort is removed, and instead describe how to switch the value of improved_mboxlist_sort.
>
> Commit 2f8e5019d92b2d227a5e11abd431730991751646 and others extend ctl_mboxlist.c to dump/undump all the fields of the mboxlist-database: uniqueid, foldermodseq, legacy_specialuse, mtime, uidvalidity.  The uniqueid field exists since commit 55fb682addda8c630f413c7e6a15c4 and is included in version Cyrus IMAP 2.5 in the mboxlist-database.
>
> If a switch to improved_mboxlist_sort:1 is necessary, it implies importing and exporting the mboxlist database with ctl_mboxlist -https://www.cyrusimap.org/3.6/imap/developer/thoughts/improved_mboxlist_sort.html .  It might be sufficient just to dump and undump, when improved_mboxlist_sort does nothing, so can be done with version 3.6 or later. If the export/import is done before version 3.6, then patches to ctl_mboxlist.c should be backported to the used version, so that all fields are
> exported/imported.  The “Supported Product Series” of Cyrus IMAP are listed athttps://www.cyrusimap.org/imap/download/release-notes/index.html .
>
> Greetings // Дилян
>
> -----Original Message-----
> From: Wolfgang Breyha via Info<[email protected]>
> Reply-To: Info<[email protected]>
> To:[email protected]
> Subject: Re: Migration murder from 3.2 to 3.10 (Debian 11 to 13) – frontend to backend auth error
> Date: 06/03/26 17:57:44
>
> On 04/03/2026 16:00, Дилян Палаузов wrote:
>> However, I can neither confirm nor deny that a switch to
>> `improved_mboxlist_sort:1` is necessary before this option is removed
>> from Cyrus IMAP. If it is nesessary, some note should be added to
>> upgrade instructions for the versions, where this is needed.
> This highly depends on the actual list of mailboxes.
> If switching to improved_mboxlist_sort makes a difference for the resulting
> sort order of " ", "-" and "." the backends fail to do the "ctl_mboxlist
> -m" to the mupdate master and wont start.
>
> #5043,#5524 on github contain examples.
>
> Greetings,
> Wolfgang
>
> ------------------------------------------
> Cyrus: Info
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-- 
Frank Richter, Chemnitz University of Technology, Germany

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