dovecot - Jun 2009 - Corrupted index cache file issues (Corrupted physical size)

Hello,

I'm running Dovecot 1.1.13 on FreeBSD 7.0-RELEASE and I'm receiving a 
large number of errors much like the following:

dovecot: Jun 08 09:27:04 Error: IMAP(x at x.x): Corrupted index cache file 
/nfs/x.x/x/Maildir/dovecot.index.cache: Corrupted physical size for 
uid=2284: 5312 != 5217
dovecot: Jun 08 09:27:04 Error: IMAP(x at x.x): Corrupted index cache file 
/nfs/x.x/x/Maildir/dovecot.index.cache: Corrupted physical size for 
uid=2281: 6992 != 6894
dovecot: Jun 08 09:31:17 Error: IMAP(y at y.y): Corrupted index cache file 
/nfs/y.y/y/Maildir/dovecot.index.cache: Corrupted physical size for 
uid=9241: 14545 != 14453
dovecot: Jun 08 09:37:05 Error: IMAP(z at z.z): Corrupted index cache file 
/nfs/z.z/z/Maildir/dovecot.index.cache: Corrupted physical size for 
uid=22741: 12150 != 12066

These are not occurring for all users, but it occurs frequently for the 
addresses that do show up in the logs. The maildirs are migrated from a 
previous courier server. I've tried searching the archives and can't 
find anything related to this error. Could someone shed some light on 
it? Other than the error messages, I'm not aware of anything being 
affected, but I'd like to be sure of it

Some info about the configuration:

Maildirs are accessed via NFS, related settings are
mmap_disable: yes
mail_nfs_storage: yes
mail_nfs_index: yes
lock_method: dotlock

Regards,
Brent

A little more investigation reveals the trend is that the users 
receiving this error access their accounts via POP3. I assume that the 
UID in this error is the UID of a message. What could be causing the 
physical size in the cache to be incorrect?

Brent Bloxam wrote:
> Hello,
> 
> I'm running Dovecot 1.1.13 on FreeBSD 7.0-RELEASE and I'm receiving
a
> large number of errors much like the following:
> 
> dovecot: Jun 08 09:27:04 Error: IMAP(x at x.x): Corrupted index cache file 
> /nfs/x.x/x/Maildir/dovecot.index.cache: Corrupted physical size for 
> uid=2284: 5312 != 5217
> dovecot: Jun 08 09:27:04 Error: IMAP(x at x.x): Corrupted index cache file 
> /nfs/x.x/x/Maildir/dovecot.index.cache: Corrupted physical size for 
> uid=2281: 6992 != 6894
> dovecot: Jun 08 09:31:17 Error: IMAP(y at y.y): Corrupted index cache file 
> /nfs/y.y/y/Maildir/dovecot.index.cache: Corrupted physical size for 
> uid=9241: 14545 != 14453
> dovecot: Jun 08 09:37:05 Error: IMAP(z at z.z): Corrupted index cache file 
> /nfs/z.z/z/Maildir/dovecot.index.cache: Corrupted physical size for 
> uid=22741: 12150 != 12066
> 
> These are not occurring for all users, but it occurs frequently for the 
> addresses that do show up in the logs. The maildirs are migrated from a 
> previous courier server. I've tried searching the archives and
can't
> find anything related to this error. Could someone shed some light on 
> it? Other than the error messages, I'm not aware of anything being 
> affected, but I'd like to be sure of it
> 
> Some info about the configuration:
> 
> Maildirs are accessed via NFS, related settings are
> mmap_disable: yes
> mail_nfs_storage: yes
> mail_nfs_index: yes
> lock_method: dotlock
> 
> Regards,
> Brent

On Jun 8, 2009, at 7:06 AM, Brent Bloxam wrote:
> Hello,
>
> I'm running Dovecot 1.1.13 on FreeBSD 7.0-RELEASE and I'm receiving
> a large number of errors much like the following:
>
> dovecot: Jun 08 09:27:04 Error: IMAP(x at x.x): Corrupted index cache  
> file /nfs/x.x/x/Maildir/dovecot.index.cache: Corrupted physical size  
> for uid=2284: 5312 != 5217
How are you saving messages to the maildir? Do these happen for new  
mails also or only old ones?