sieve stopped working and doveadm mailbox list without -s shows less folders then with

[Aki Tuomi]

On 18.09.2017 12:20, Ralf Becker wrote:
> Hi Aki,
>
> Am 18.09.17 um 11:13 schrieb Aki Tuomi:
>> On 18.09.2017 12:10, Ralf Becker wrote:
>>> Am 14.09.17 um 01:07 schrieb Timo Sirainen:
>>>> On 7 Sep 2017, at 17.42, Ralf Becker <rb at egroupware.org> wrote:
>>>>> Dovecot 2.2.31 with mailboxes in mdbox format.
>>>>>
>>>>> Since a couple of days some mailboxes have the problem, that sieve rules
>>>>> moving mails to folders stop working and .sieve.log in mailbox shows:
>>>>>
>>>>> sieve: info: started log at Sep 07 13:57:17.
>>>>> error:
>>>>> msgid=<20170907155704.EGroupware.S4yThVJRr12WSiJLpKbK0Bz at somedomain.egroupware.de>:
>>>>> failed to store into mailbox 'INBOX/Munser': Mailbox doesn't exist:
>>>>> INBOX/Munser.
>>>>>
>>>>> When I do a doveadm mailbox list -s -u <user>@<domain> I get all folders
>>>>> incl. the one mentioned above, while doveadm mailbox list without -s
>>>>> shows just
>>>>> user
>>>>> INBOX
>>>> Subscriptions are stored independently from the actual folders. So it looks like the subscription file exists and is correct, but somehow you've lost all the folders. Do you see the folders in the filesystem under user/mailboxes/ directory? 
>>> Yes, the folders exist under
>>> /var/dovecot/imap/<domain>/<user>/mdbox/mailboxes/.
>>> Just doveadm mailbox list -u <user>@<domain> (without -s) does only show
>>> INBOX and user.
>>> (I can send you the list of folders via private mail, but I can not post
>>> them on the list.)
>>>
>>> Anything I can do to get Dovecot to eg. rescan the folders from the
>>> filesystem or any other way to fix that problem?
>>> I have it with a couple of mailboxes, so I believe it's some kind of
>>> systematic problem, nothing the users did.
>>>
>>> Ralf
>>>
>>>> My guess is that it only has INBOX, which means the folders were deleted by something (Dovecot corruption can't lose entire folders - something must explicitly delete them).
>> You can always try doveadm force-resync -u victim "*"
>>
>> You should run it twice, I guess.
> Tried that before and just tried it again, no luck :(
>
> root at fra-nfs-mail:/var/dovecot/imap/<domain># doveadm force-resync -u
> <user>@<domain> "*"
> doveadm(<user>@<domain>): Warning: fscking index file
> /var/dovecot/imap/<domain>/<user>/mdbox/storage/dovecot.map.index
> doveadm(<user>@<domain>): Warning: mdbox
> /var/dovecot/imap/<domain>/<user>/mdbox/storage: rebuilding indexes
> doveadm(<user>@<domain>): Warning: Transaction log file
> /var/dovecot/imap/<domain>/<user>/mdbox/storage/dovecot.map.index.log
> was locked for 72 seconds (mdbox storage rebuild)
> doveadm(<user>@<domain>): Warning: fscking index file
> /var/dovecot/imap/<domain>/<user>/mdbox/storage/dovecot.map.index
>
> root at fra-nfs-mail:/var/dovecot/imap/<domain># doveadm force-resync -u
> <user>@<domain> "*"
> doveadm(<user>@<domain>): Warning: fscking index file
> /var/dovecot/imap/<domain>/<user>/mdbox/storage/dovecot.map.index
> doveadm(<user>@<domain>): Warning: mdbox
> /var/dovecot/imap/<domain>/<user>/mdbox/storage: rebuilding indexes
> doveadm(<user>@<domain>): Warning: fscking index file
> /var/dovecot/imap/<domain>/<user>/mdbox/storage/dovecot.map.index
>
> root at fra-nfs-mail:/var/dovecot/imap/<domain># doveadm mailbox list -u
> <user>@<domain>
> user
> INBOX
>
> What else can I do to analyse the problem?
>
> Ralf
>

It seems you are running into
https://github.com/dovecot/core/commit/c8be39472a93a5de2cc1051bdbd4468bea0ca7ba#diff-664ea8e9082f57f29f8a284ced77d165

Aki