[Dovecot] maildir_file_do(/var/admhome/user/Maildir) racing

[Ralf Hildebrandt]

dovecot version 1.0.0, compile from the sources.

--------- snip --------
# /usr/local/etc/dovecot.conf
listen: *:10143
ssl_listen: *:10943
ssl_cert_file: /etc/ssl/certs/postamt.pem
ssl_key_file: /etc/ssl/private/postamt.key
disable_plaintext_auth: no
login_dir: /usr/local/var/run/dovecot/login
login_executable: /usr/local/libexec/dovecot/imap-login
mail_location: maildir:~/Maildir
mail_plugins: quota imap_quota
namespace:
  type: private
  separator: .
  prefix: INBOX.
  inbox: yes
auth default:
  passdb:
    driver: pam
  userdb:
    driver: passwd
plugin:
  quota: maildir
  quota: maildir:ignore=Trash
--------- snip --------

We're using these odd ports, because there's still courier-imap on the
original ports.

One, just one (!) of our users gets:

May 14 16:47:17 postamt dovecot: imap-login: Login: user=<username>, method=PLAIN, rip=141.42.x.y, lip=ip.of.the.server
May 14 16:47:17 postamt dovecot: imap-login: Login: user=<username>, method=PLAIN, rip=141.42.x.y, lip=ip.of.the.server
May 14 16:47:17 postamt dovecot: IMAP(username): maildir_file_do(/var/admhome/username/Maildir) racing
May 14 16:47:17 postamt dovecot: IMAP(username): Disconnected: Internal error occurred. Refer to server log for more information. [2007-05-14 16:47:17]

Now it's a bit hard for me to see what's going on.
/var/admhome/username/Maildir is on /, thus:

$ mount
/dev/cciss/c0d0p6 on / type ext3 (rw,errors=panic)

$ dmesg
does not complain about any corruption

$ uname -a
Linux postamt.charite.de 2.6.21.1 #1 SMP Tue May 1 15:50:11 CEST 2007 i686 GNU/Linux

OS: Debian testing

-- 
Ralf Hildebrandt (i.A. des IT-Zentrums)         Ralf.Hildebrandt at charite.de
Charite - Universitätsmedizin Berlin            Tel.  +49 (0)30-450 570-155
Gemeinsame Einrichtung von FU- und HU-Berlin    Fax.  +49 (0)30-450 570-962
IT-Zentrum Standort CBF                    send no mail to plonk at charite.de