[Dovecot] Error in logs indicating broken files

[Timo Sirainen]

On 21.4.2012, at 6.32, Joseph Tam wrote:

>> Error: Corrupted index cache file/home/xxxxxx/mail/.imap/sent-mail/dovecot.index.cache: Broken virtual size for mail UID 67: 1 Time(s)
>> Error: FETCH [] for mailbox ~/mail/sent-mail UID 67 got too little data: 6203 vs 7478: 1 Time(s)
> 
> This is just one dovecot IMAP client process moaning after another user
> client process pulled the rug out from under it by modifying the mailbox.
> I get a few dozen log entries of this sort per week with ~200 IMAP users
> without shared access.

Well, it is a bug and it shouldn't happen. But since it happens only with mbox, I haven't bothered to look into it.