BUG: Mailbox renaming algorithm got into a potentially infinite loop, aborting

[Alex Ha]

On Wed, Oct 16, 2019 at 4:55 PM Timo Sirainen <timo at sirainen.com> wrote:

> On 25 Sep 2019, at 17.03, Alex Ha via dovecot <dovecot at dovecot.org> wrote:
>
>
> Hi all!
>
> I have two dovecot servers with dsync replication over tcp.
> Replication works fine except for one user.
>
> # doveadm replicator status
> username
> priority fast sync full sync success sync failed
> customer at example.com
> none     00:00:33  07:03:23  03:22:31     y
>
> If i run dsync manually, i get the following error message:
>
> dsync-local(customer at example.com): Debug: brain M: -- Mailbox renamed,
> restart sync --
> dsync-local(customer at example.com): Error: BUG: Mailbox renaming algorithm
> got into a potentially infinite loop, aborting
> dsync-local(customer at example.com): Error: Mailbox INBOX.Foldername sync:
> mailbox_rename failed: Invalid mailbox name 'Foldername-temp-1': Missing
> namespace prefix 'INBOX.'
>
> I've never fixed this because I haven't figured out how to reproduce it.
> If it happens with you all the time, could you try:
>
>  - Get a copy of both replica sides, e.g. under /tmp/replica1 and
> /tmp/replica2
>  - Make sure dsync still crashes with them, e.g. doveadm -o
> mail=maildir:/tmp/replica1 sync maildir:/tmp/replica2
>  - Delete all mails and dovecot.index* files (but not dovecot.mailbox.log)
>  - Make sure dsync still crashes
>  - Send me the replicas - they should no longer contain anything sensitive
>
> As for fixing, you could see if deleting dovecot.mailbox.log from both
> replicas happens to fix this.
>
>
Unfortunatley deleting dovecot.mailbox.log on both replicas did not fix the
problem.

Alex
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