dovecot - Oct 2006 - Index corruption causes child process to die

My recent migration from Courier-IMAP to Dovecot has been marred by
these errors:

Oct 24 12:12:40 server dovecot: IMAP(juha): Fixed index file
~user/Maildir/.Geekzone/dovecot.index: first_recent_uid_lowwater 431
-> 430
Oct 24 12:12:40 server dovecot: IMAP(juha): Corrupted index file
~user/Maildir/.Geekzone/dovecot.index: Duplicate header extension
keywords
Oct 24 12:12:40 server dovecot: child 5786 (imap) killed with signal 11

They happen with Thunderbird 1.5.0.7 and I'm using Dovecot 1.0RC7 from
the FreeBSD ports.

I think the index corruption may be caused by Tbird's message
filtering - I'm asking it to filter certain messages from INBOX to
subfolders.

When the error occurs, Tbird pops up an error message saying it can't
connect to the mail server, but I don't lose any messages it seems.
Instead, I get duplicates and even triplicates when I restart Tbird.

Any work around for this?

-- 
Juha
http://www.geekzone.co.nz/juha

On 10/24/06, Juha Saarinen <juhasaarinen at gmail.com>
wrote:
> My recent migration from Courier-IMAP to Dovecot has been marred by
> these errors:
>
> Oct 24 12:12:40 server dovecot: IMAP(juha): Fixed index file
> ~user/Maildir/.Geekzone/dovecot.index: first_recent_uid_lowwater 431
> -> 430
> Oct 24 12:12:40 server dovecot: IMAP(juha): Corrupted index file
> ~user/Maildir/.Geekzone/dovecot.index: Duplicate header extension
> keywords
> Oct 24 12:12:40 server dovecot: child 5786 (imap) killed with signal 11
>
> They happen with Thunderbird 1.5.0.7 and I'm using Dovecot 1.0RC7 from
> the FreeBSD ports.
>
> I think the index corruption may be caused by Tbird's message
> filtering - I'm asking it to filter certain messages from INBOX to
> subfolders.
>
> When the error occurs, Tbird pops up an error message saying it can't
> connect to the mail server, but I don't lose any messages it seems.
> Instead, I get duplicates and even triplicates when I restart Tbird.
>
> Any work around for this?
This took care of the index corruption (touch wood):

lock_method=dotlock
mmap_disable=yes

Before, I was using the defaults:

lock_method=fcntl
mmap_disable=no

At this stage, I'm not sure if it was the change of index locking
method or disabling mmapping that fixed things.

-- 
Juha
http://www.geekzone.co.nz/juha