[Dovecot] 1.2.9 imap crash with backtrace

[David Halik]

On 01/20/2010 04:49 AM, Timo Sirainen wrote:
> On 20.1.2010, at 11.45, Timo Sirainen wrote:
>
>> On 12.1.2010, at 16.47, Timo Sirainen wrote:
>>
>>> So there's something weird going on why it's in the filename hash 
>>> table, but not in the array. I'll try to figure it out later..
>>
>> This should fix it (and hopefully doesn't expose another bug): 
>> http://hg.dovecot.org/dovecot-1.2/rev/a1177c6cf8c7
>
> I think that fixes all of the "duplicate entry in uidlist" errors that 
> have been reported recently. So please test soon and report how it 
> goes over a few days, and I'll release 1.2.10.

That seems to have done the trick. I've been running it for the past two 
hours in production and have not seen a single dump. The behavior looks 
like it handles it correctly now rather than dumping. I'll report back 
in a day or two to confirm that it has been stable, but so far so good. 
Thank you very much Timo.

Here's an example of stale nfs -> duplicate files instance with the patch...

Jan 20 13:06:17 gehenna14.rutgers.edu dovecot: IMAP(user): 
fdatasync(/rci/nqu/rci/u2/user/dovecot/.INBOX/dovecot-uidlist) failed: 
Stale NFS file handle
Jan 20 13:06:17 gehenna14.rutgers.edu dovecot: IMAP(user): 
/rci/nqu/rci/u2/user/dovecot/.INBOX/dovecot-uidlist: next_uid was 
lowered (9531 -> 8975, hdr=8975)
Jan 20 13:13:59 gehenna13.rutgers.edu dovecot: IMAP(user): 
/rci/nqu/rci/u2/user/dovecot/.INBOX/dovecot-uidlist: Duplicate file 
entry at line 3: 
1259771459.M806388P24066V04240001I002E8FC6_0.gehenna7.rutgers.edu,S=3927:2,S 
(uid 8420 -> 9532)
Jan 20 13:13:59 gehenna13.rutgers.edu dovecot: IMAP(user): 
/rci/nqu/rci/u2/user/dovecot/.INBOX/dovecot-uidlist: Duplicate file 
entry at line 4: 
1259771993.M755737P14220V045C0002I002E8FC7_0.gehenna8.rutgers.edu,S=2768:2,S 
(uid 8421 -> 9533)
##### SNIP #####
Jan 20 13:13:59 gehenna13.rutgers.edu dovecot: IMAP(user): 
/rci/nqu/rci/u2/user/dovecot/.INBOX/dovecot-uidlist: Duplicate file 
entry at line 330: 
1261199619.M995718P21199V03E80002I00B1AC1D_0.gehenna9.rutgers.edu,S=18949:2,Sa 
(uid 8747 -> 9859)

Notice it's dump free at the end! ;)



-- 
================================
David Halik
System Administrator
OIT-CSS Rutgers University
dhalik at jla.rutgers.edu
================================