[Dovecot] Error: Threading lost Message ID?

[Ralf Hildebrandt]

* Timo Sirainen <tss at iki.fi>:
> On Fri, 2013-08-09 at 15:45 +0200, Ralf Hildebrandt wrote:
> > QUERY:    THREAD REFERENCES ISO-8859-1 ALL
> > RESPONSE: [SERVERBUG] Internal error occurred. Refer to server log for more information. [2013-08-09 15:42:34]
> > 
> > Aug  9 15:41:48 postamt dovecot: imap(username) tTbs7oPjfACNKs4m: Error: Threading lost Message ID
> > Aug  9 15:42:34 postamt dovecot: imap(username) tTbs7oPjfACNKs4m: Error: Threading lost Message ID
> > 
> > What does that mean? WHY has the Message-Id been lost? How can I find
> > out WHICH MAIL caused this?
> 
> Can you reproduce it?

Yes. It always happens when accessing the user's mailbox and enabling
THREADING in Squirrelmail.

> I'm guessing dovecot.index.thread file was corrupted and caused this.
> It should probably rebuild the thread if this error happens.
> 
> Or if you can reproduce this without dovecot.index.thread then it's
> definitely a bug and I'd like to get some headers to reproduce it:
> 
> doveadm fetch -u user at domain 'hdr.message-id hdr.in-reply-to hdr.references' mailbox INBOX
> 
> Anyway, improved the error message: http://hg.dovecot.org/dovecot-2.2/rev/5de1e4fdb758

I'll try removin the dovecot.index.thread for starters

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de