[Dovecot] imap signal 6 crash with backtrace (1.2rc5)

[Timo Sirainen]

On Jul 27, 2009, at 3:11 AM, Ralf Hildebrandt wrote:

> * Timo Sirainen <tss at iki.fi>:
>
>> Is it possible that the entire virus-al mailbox gets deleted and
>> recreated (while the mailbox is open)?
>
> No.
> There may be processes that delete files/mails from the Maildir,  
> though.
>
>> Do you have any "UIDVALIDITY changed" lines in logs?
>
> # zfgrep -h virus-al /var/log/OLD/2009-07-*/pop3d-imapd.log |grep  
> UIDVALIDITY
> Jul  2 02:27:19 postamt dovecot: IMAP(virus-al): Maildir /home/v/i/ 
> virus-al/Maildir: UIDVALIDITY changed (1246493487 -> 1246494049)
> Jul  2 22:25:34 postamt dovecot: IMAP(virus-al): Maildir /home/v/i/ 
> virus-al/Maildir: UIDVALIDITY changed (1246564263 -> 1246566306)
> Jul 18 21:30:00 postamt dovecot: IMAP(virus-al): Maildir /home/v/i/ 
> virus-al/Maildir: UIDVALIDITY changed (1247941041 -> 1247944777)
> That's all for last month

OK, that definitely means something's either deleting dovecot-uidlist  
files or changing that mailbox's index files in some way, which then  
causes the UIDVALIDITY changed errors and/or next_uid changed errors.  
Neither should really be happening.. I can always try to get those  
crashes fixed, but I think the underlying problem is some external  
script or something.