dovecot - Mar 2006 - mbox-sync-update.c error

Hi,

I think the problem is in Dovecot.  I'm using both Evolution and
Thunderbird on a Gentoo box.

One of my folders keeps locking up and the clients can't retrieve the
messages.  The situation appears to be triggered by trying to move a
message into that folder.  Deleting the index files
(under /var/log/dovecot/xxx/) solves the problem (temporarily).


I get these error messages in the logs:

Mar 31 15:10:34 dovecot: imap(cvicente): mbox sync: UID inserted in the
middle of mailbox /home/xxx/Mail/xxx (93 > 3, seq=93, idx_msgs=3455)
Mar 31 15:10:34  dovecot: imap(cvicente): file mbox-sync-update.c: line
55 (mbox_sync_move_buffer): assertion failed: (ctx->mail.offset +
ctx->mail.space <= ctx->hdr_offset + pos || ctx->mail.offset >
ctx->hdr_offset + pos + have)
Mar 31 15:10:35  dovecot: child 32373 (imap) killed with signal 6
M


I'm running dovecot-1.0_beta3

Hope this gets some attention from the developers.

cv
>In the maillog I get
>
>    Mar 29 09:17:25 bree dovecot: imap-login: Login: user=<hartr>,
>    method=plain, rip=::ffff:127.0.0.1, lip=::ffff:127.0.0.1, secured
>    Mar 29 09:17:25 bree dovecot: imap(hartr): mbox sync: UID inserted
>    in the middle of mailbox /var/mail/hartr (8 > 1, seq=2, idx_msgs=4)
>    Mar 29 09:17:25 bree dovecot: imap(hartr): file mbox-sync-update.c:
>    line 55 (mbox_sync_move_buffer): assertion failed: (ctx->mail.offset
>    + ctx->mail.space <= ctx->hdr_offset + pos ||
ctx->mail.offset >
>    ctx->hdr_offset + pos + have)
>    Mar 29 09:17:26 bree dove

On Fri, 2006-03-31 at 15:20 -0800, Carlos Vicente wrote:
> Mar 31 15:10:34 dovecot: imap(cvicente): mbox sync: UID inserted in the
> middle of mailbox /home/xxx/Mail/xxx (93 > 3, seq=93, idx_msgs=3455)
This is the real problem. It shouldn't be happening. Either something
outside Dovecot is breaking mboxes in a way Dovecot doesn't expect, or
Dovecot's index files are being broken, or locking is broken.

Are you using NFS? What other software than Dovecot touches the mboxes?
Do users have direct access to the mboxes? Try changing
lock_method=fcntl?
> Mar 31 15:10:34  dovecot: imap(cvicente): file mbox-sync-update.c: line
> 55 (mbox_sync_move_buffer): assertion failed: (ctx->mail.offset +
> ctx->mail.space <= ctx->hdr_offset + pos || ctx->mail.offset
>
> ctx->hdr_offset + pos + have)
This isn't good, but it's most likely caused by the above problem.

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