dovecot - Jul 2011 - BUG: Unknown internal error

With a recent checkout of dovecot-2 I'm getting a few "BUG: Unknown
internal error" messages.

The log for one such incident:

Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): copy from INBOX:
box=INBOX.Trash, uid=6385, msgid=<4DA3E334.000005.02956 at ILONA-PC>,
size=90980
Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): copy from INBOX:
box=INBOX.Trash, uid=6386, msgid=<4DA3ECDD.000008.02956 at ILONA-PC>,
size=103191
Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): delete: box=INBOX, uid=5426,
msgid=<4DA3E334.000005.02956 at ILONA-PC>, size=90980
Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): delete: box=INBOX, uid=5427,
msgid=<4DA3ECDD.000008.02956 at ILONA-PC>, size=103191
Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): expunge: box=INBOX, uid=5426,
msgid=<4DA3E334.000005.02956 at ILONA-PC>, size=90980
Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): expunge: box=INBOX, uid=5427,
msgid=<4DA3ECDD.000008.02956 at ILONA-PC>, size=103191
Jul 21 10:21:53 postamt dovecot: imap(ikurzweg): Error: Corrupted index cache
file /home/i/k/ikurzweg/Maildir/dovecot.index.cache: Broken MIME parts for mail
UID 4433
Jul 21 10:21:53 postamt dovecot: imap(ikurzweg): Disconnected: BUG: Unknown
internal error bytes=5689/114139

What's up here?
-- 
Ralf Hildebrandt
  Gesch?ftsbereich IT | Abteilung Netzwerk
  Charit? - Universit?tsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de

Am 21.07.2011 10:41, schrieb Ralf Hildebrandt:
> With a recent checkout of dovecot-2 I'm getting a few "BUG:
Unknown
> internal error" messages.
>
> The log for one such incident:
>
> Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): copy from INBOX:
box=INBOX.Trash, uid=6385, msgid=<4DA3E334.000005.02956 at ILONA-PC>,
size=90980
> Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): copy from INBOX:
box=INBOX.Trash, uid=6386, msgid=<4DA3ECDD.000008.02956 at ILONA-PC>,
size=103191
> Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): delete: box=INBOX,
uid=5426, msgid=<4DA3E334.000005.02956 at ILONA-PC>, size=90980
> Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): delete: box=INBOX,
uid=5427, msgid=<4DA3ECDD.000008.02956 at ILONA-PC>, size=103191
> Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): expunge: box=INBOX,
uid=5426, msgid=<4DA3E334.000005.02956 at ILONA-PC>, size=90980
> Jul 21 10:21:38 postamt dovecot: imap(ikurzweg): expunge: box=INBOX,
uid=5427, msgid=<4DA3ECDD.000008.02956 at ILONA-PC>, size=103191
> Jul 21 10:21:53 postamt dovecot: imap(ikurzweg): Error: Corrupted index
cache file /home/i/k/ikurzweg/Maildir/dovecot.index.cache: Broken MIME parts for
mail UID 4433
> Jul 21 10:21:53 postamt dovecot: imap(ikurzweg): Disconnected: BUG: Unknown
internal error bytes=5689/114139
>
> What's up here?
Jul 21 10:21:53 postamt dovecot: imap(ikurzweg): Error: Corrupted index cache
file /home/i/k/ikurzweg/Maildir/dovecot.index.cache: Broken MIME parts for mail
UID 4433
Jul 21 10:21:53 postamt dovecot: imap(ikurzweg): Disconnected: BUG: Unknown
internal error bytes=5689/114139

Index is corrupt. Dovecot seems only to see 5689 of actually indexed 114139
bytes as far as I understand the log.

Hardware fine / HDD is fine? No 'cold' shutdowns? FS out of Space?
FS/User Quota over limit?

Dovecot usually uses internal "self-healing" feature to fixe broken
indexes ...
For testing purposes you could try to entierly delete Users root mailfolder and
recreate it or let it recreate by Dovecot and see what happens ... obviously it
would make sense to back up old root mailfoder in case there is important data
...