[Dovecot] Seeing "Corrupted transaction log file" error messages.

[Stewart Dean]

In V1.1.15 that I fell back to.  Again:

# 1.1.15: /usr/local/etc/dovecot.conf
# OS: AIX 3 0001378F4C00  
listen: *:143
ssl_listen: *:993
disable_plaintext_auth: no
verbose_ssl: yes
login_dir: /var/run/dovecot/login
login_executable: /usr/local/libexec/dovecot/imap-login
login_processes_count: 12
login_max_processes_count: 774
max_mail_processes: 1024
verbose_proctitle: yes
first_valid_uid: 200
mail_location: mbox:~/mail:INBOX=/var/spool/mail/%u:INDEX=/var/dcindx/%u
mbox_write_locks: fcntl
mbox_dirty_syncs: no
auth default:
  passdb:
    driver: pam
  userdb:
    driver: passwd

This is happening during peak load; the error msgs I'm seeing look like:

Nov  5 15:01:47 mercury mail:err|error dovecot: IMAP(olson): Corrupted transaction log file /var/dci
ndx/olson/.imap/INBOX/dovecot.index.log seq 742: file_seq=742, min_file_offset (24) < hdr_size (40) 
(sync_offset=24)
Nov  5 15:04:13 mercury mail:err|error dovecot: IMAP(herchenr): Corrupted transaction log file /var/
dcindx/herchenr/.imap/INBOX/dovecot.index.log seq 357: file_seq=357, min_file_offset (24) < hdr_size
 (40) (sync_offset=24)
Nov  5 15:04:13 mercury mail:info dovecot: IMAP(herchenr): Disconnected: Internal error occurred. Re
fer to server log for more information. [2009-11-05 15:04:13] bytes=1314/18024
Nov  5 15:04:33 mercury mail:err|error dovecot: IMAP(olson): Transaction log file /var/dcindx/olson/
.imap/INBOX/dovecot.index.log: marked corrupted
Nov  5 15:06:17 mercury mail:err|error dovecot: IMAP(olson): Corrupted transaction log file /var/dci
ndx/olson/.imap/INBOX/dovecot.index.log seq 742: file_seq=742, min_file_offset (24) < hdr_size (40) 
(sync_offset=24)
Nov  5 15:06:17 mercury mail:err|error dovecot: IMAP(olson): Transaction log got desynced for index 
/var/dcindx/olson/.imap/INBOX/dovecot.index

Is worrisome or inconsequential?  About 40 such messages in 30 minutes, 
mostly clumped together
-- 
==== Once upon a time, the Internet was a friendly, 
neighbors-helping-neighbors small town, and no one locked their doors. 
Now it's like an apartment in Bed-Stuy: you need three heavy duty 
pick-proof locks, one of those braces that goes from the lock to the 
floor, and bars on the windows.... ==== Stewart Dean, Unix System Admin, 
Bard College, New York 12504 sdean at bard.edu voice: 845-758-7475, fax: 
845-758-7035