dovecot - Feb 2016 - Inconsistent mdbox index while running doveadm altmove

Hello,

 

I was performing doveadm altmove for one account while this mailbox was
being accessed.

 

Dovecot version: 2.2.21

Mailbox format: mdbox

 

Command:

doveadm altmove -u user1 at domain.com.br before 360d

 


This command took about 5 minutes to finish and during the execution I found
some log messages:

 

Feb 25 19:57:51 dovecot: imap(user1 at domain.com.br): Error: mdbox map
/var/mail/user1/mdbox/storage/dovecot.map.index corrupted: Unexpectedly lost
INBOX uid=77 map_uid=76

Feb 25 19:57:51 dovecot: imap(user1 at domain.com.br): Internal error occurred.
Refer to server log for more information. [2016-02-25 19:57:51] in=4798
out=1361819 deleted=0 expunged=0 trashed=0

Feb 25 19:57:51 dovecot: imap(user1 at domain.com.br): Warning: fscking index
file /var/mail/user1/mdbox/storage/dovecot.map.index

Feb 25 19:58:15 dovecot: imap(user1 at domain.com.br): Error:
/var/mail/user1/mdbox/mailboxes/INBOX/dbox-Mails/dovecot.index reset, view
is now inconsistent

Feb 25 19:58:20 dovecot: imap(user1 at domain.com.br): Error:
/var/mail/user1/mdbox/mailboxes/Rascunhos/dbox-Mails/dovecot.index reset,
view is now inconsistent

 

After that these messages moved to alternate storage disappeared from the
mailbox/IMAP but these files were all on alternative storage.

I had to execute doveadm force-resync -u user1 at domain.com.br INBOX to
recovery this mailbox, but losing all e-mail's flags.

 

I should do some kind of lock before running the command altmove ?

 

Regards,

Ricardo

On 29 Feb 2016, at 23:31, Ricardo Machini Barbosa <ricardomachini at
gmail.com> wrote:
> 
> Hello,
> 
> I was performing doveadm altmove for one account while this mailbox was
> being accessed.
> 
> 
> 
> Dovecot version: 2.2.21
> 
> Mailbox format: mdbox
> 
> 
> 
> Command:
> 
> doveadm altmove -u user1 at domain.com.br before 360d
Was it the first time you ran it for this user?
> This command took about 5 minutes to finish and during the execution I
found
> some log messages:
> 
> 
> 
> Feb 25 19:57:51 dovecot: imap(user1 at domain.com.br): Error: mdbox map
> /var/mail/user1/mdbox/storage/dovecot.map.index corrupted: Unexpectedly
lost
> INBOX uid=77 map_uid=76
It's not necessarily the altmove that broke this. It could have just noticed
this existing problem.
> After that these messages moved to alternate storage disappeared from the
> mailbox/IMAP but these files were all on alternative storage.
> 
> I had to execute doveadm force-resync -u user1 at domain.com.br INBOX to
> recovery this mailbox, but losing all e-mail's flags.
This again shouldn't happen..
> I should do some kind of lock before running the command altmove ?
No. I attempted to reproduce this with some stress testing, but wasn't able
to.