[Dovecot] Question about "Storage keeps breaking" in logs

[Timo Sirainen]

On Wed, 2011-06-22 at 19:32 +0000, Maria Arrea wrote:

>  Jun 6 17:03:23 buzon dovecot: imap(juanan): Warning: mdbox /buzones/18/66/juanan/storage: rebuilding indexes

Problem 1: It doesn't log the reason for this rebuild. I can find only
one place in code why that could happen, fixed:
http://hg.dovecot.org/dovecot-2.0/rev/028b953e7040

>  Jun 6 17:03:26 buzon dovecot: imap(juanan): Error: mdbox /buzones/18/66/juanan/mailboxes/P7.Bielorrusia/cd-eslpod-enviado/dbox-Mails: Storage keeps breaking

Problem 2: It apparently can't fix that error. But in my tests it gets
fixed fine..

>  Jun 6 17:03:27 buzon dovecot: imap(juanan): Error: Recent flags state corrupted for mailbox Deleted Messages

Probably related to the index rebuild.

So this is a local disk with ext4 filesystem, nothing special? It
shouldn't be breaking..

How often do these happen? Can you reproduce these by running imaptest
against a test account? http://imapwiki.org/ImapTest