[Dovecot] Duplicate Mails downloding issue

[Steffen Kaiser]

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On Thu, 25 Jul 2013, Kavish Karkera wrote:

> Thanks Steffen for the valuable knowledge.
> Need to know futher that, how could this lead to mails to get re-downloaded. ??

Because Dovecot detects that the UID list is erroreous and therefore 
rebuilts it. To prevent data loss, either the complete list of messages or 
just the conflicting ones [the messages that had been delivered in 
parallel and caused the while problem] do appear as new to the clients.

> ________________________________
> From: Steffen Kaiser <skdovecot at smail.inf.fh-brs.de>
> To: Kavish Karkera <kavish.karkera at yahoo.com>
> Cc: "dovecot at dovecot.org" <dovecot at dovecot.org>
> Sent: Thursday, 25 July 2013 5:54 PM
> Subject: Re: [Dovecot] Duplicate Mails downloding issue
>
>
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> On Thu, 25 Jul 2013, Kavish Karkera wrote:
>
>> -------------------------------------------------------------------------------------------------------------------------------------------------------
>>
>> Jul 23 15:34:51 popserver dovecot: pop3(14949_kavish): Warning: Locking transaction log file /indexes//mail/v3store/example.com/14949_kavish/.INBOX/dovecot.index.log took 133 seconds
>
> some process keeps the INBOX locked, but does not touch the file, so it
> looks like a stale lock.
>
>> Jul 23 15:34:51 popserver dovecot: pop3(kavish at example.com): Error: Broken file /indexes//mail/v3store/example.com/14949_kavish/.INBOX/dovecot-uidlist line 180: UIDs not ordered (10156 >= 10156)
>
> Therefore some other process had broken the lock and had appended a
> message.
>
>> Jul 23 15:35:01 popserver dovecot: pop3(kavish at example.com): Error: utime(/indexes//mail/v3store/example.com/kavish/.INBOX/dovecot-uidlist.lock) failed: No such file or directory
>>
>> Jul 23 15:35:11 popserver dovecot: pop3(kavish at example.com): Error: utime(/indexes//mail/v3store/example.com/kavish/.INBOX/dovecot-uidlist.lock) failed: No such file or directory
>
> then the former process(es) finish and try to clean up, but the "some
> other process" already deleted the lock file.
>
>> Jul 23 15:35:21 popserver dovecot: pop3(kavish at example.com): Warning: Our dotlock file /indexes//mail/v3store/example.com/kavish/.INBOX/dovecot-uidlist.lock was deleted (kept it 30 secs)
>> ---------------------------------------------------------------------------------------------------------------------------------------------------------
>
> So you have to check your system why a process, that as locked INBOX, is
> stalled for more than 120min.
>
> - --
> Steffen Kaiser
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- -- 
Steffen Kaiser
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