Corrupted index cache file errors on 64bit systems

[Lapo Calamandrei]

I have a lot of "Corrupted index cache file /home/$USER/Maildir/dovecot.index.cache: Duplicated field in header: hdr.CONTENT-TYPE" moving files between the a folder to another, consider that dovecot is the only process writing to the maildirs, I found references to this bug in this discussion: http://www.dovecot.org/list/dovecot/2006-February/011297.html
It affect only 64bit system and is corrected in the betas, see: http://www.dovecot.org/list/dovecot/2006-February/011360.html

So please update dapper package.

Some datas about my system:

fresh dapper-server of feb 2006 install

lapo@posta:~$ uname -a
Linux posta 2.6.15-16-amd64-xeon #1 SMP PREEMPT Mon Feb 20 17:28:40 UTC 2006 x86_64 GNU/Linux

interesting bits in mail.log:
Mar 2 19:18:45 posta last message repeated 3 times
Mar 2 19:19:05 posta dovecot: imap(lapo): Corrupted index cache file /home/lapo/Maildir/dovecot.index.cache: Duplicated field in header: hdr.CONTENT-TYPE
Mar 2 19:19:05 posta dovecot: imap(lapo): Corrupted index cache file /home/lapo/Maildir/dovecot.index.cache: invalid field header size

lapo@posta:~$ dpkg -l dovecot*
Desiderato=sconosciUto/Installato/Rimosso/P:eliminato/H:bloccato
| Stato=Non/Installato/file Config./U:spacchett./conf. Fallita/H:inst.parzial.
|/ Err?=(nessuno)/H:bloc./necess.Reinst./X=entrambi (Stato,Err: maiusc.=grave)
||/ Nome Versione Descrizione
+++-==============-==============-============================================
un dovecot <non definita> (descrizione non disponibile)
ii dovecot-common 1.0.alpha5-1ub secure mail server that supports mbox and ma
ii dovecot-imapd 1.0.alpha5-1ub secure IMAP server that supports mbox and ma
ii dovecot-pop3d 1.0.alpha5-1ub secure POP3 server that supports mbox and ma

lapo@posta:~$ cat /proc/mounts
rootfs / rootfs rw 0 0
none /sys sysfs rw 0 0
none /proc proc rw,nodiratime 0 0
udev /dev tmpfs rw 0 0
/dev/mapper/Neri-root / ext3 rw,data=ordered 0 0
/dev/mapper/Neri-root /dev/.static/dev ext3 rw,data=ordered 0 0
tmpfs /var/run tmpfs rw 0 0
tmpfs /var/lock tmpfs rw 0 0
tmpfs /lib/modules/2.6.15-16-amd64-xeon/volatile tmpfs rw 0 0
devpts /dev/pts devpts rw 0 0
tmpfs /dev/shm tmpfs rw 0 0
tmpfs /var/run tmpfs rw 0 0
tmpfs /var/lock tmpfs rw 0 0
/dev/mapper/Neri-var /var ext3 rw,data=ordered 0 0
/dev/md0 /boot ext3 rw,data=ordered 0 0
/dev/mapper/Neri-tmp /tmp ext3 rw,data=ordered 0 0
/dev/mapper/Neri-usr /usr ext3 rw,data=ordered 0 0
/dev/mapper/Neri-home /home ext3 rw,noatime,data=ordered 0 0

nothing special in /var/log/messages

Thanks for your attention.

[Lapo Calamandrei (calamandrei)]

some other interesting bits:

The client imap I'm using is thunderbid 1.0.7 (20051013)

lapo@posta:~$ sudo cat /etc/dovecot/dovecot.conf | grep -v \# | grep -v ^$
protocols = imap imaps pop3 pop3s
ssl_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
ssl_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
disable_plaintext_auth = no
log_timestamp = "%Y-%m-%d %H:%M:%S "
syslog_facility = mail
mail_extra_groups = mail
mmap_disable = yes
maildir_copy_with_hardlinks = yes
protocol imap {
  imap_client_workarounds = outlook-idle tb-extra-mailbox-sep
}

protocol pop3 {

  pop3_uidl_format = %08Xu%08Xv
  pop3_client_workarounds = outlook-no-nuls
}
auth default {
  mechanisms = plain
  passdb pam {
  }
  userdb passwd {
  }
  user = root
}

[Lapo Calamandrei (calamandrei)]

I have no more ""Corrupted index cache file" messages with latest dapper package (docecot-imapd 1.0.beta3-3ubuntu3), I think this bug can be closed.

[Gustavo Carneiro (gjc)]

I keep having these errors with latest dapper.

In my case dovecot is running on a 32-bit system, not 64bit. But mails arrive on a postfix server running on an amd64 box that NFS-mounts the user accounts containing Maildir's and drops files in there.