[Dovecot] Solved! Re: messages_count too large errors (1.0RC5)

Jeff Turner jeff at atlassian.com
Tue Aug 22 04:39:52 EEST 2006

On Fri, Aug 11, 2006 at 01:16:09AM +0300, Timo Sirainen wrote:
> On Wed, 2006-08-09 at 16:24 +1000, Jeff Turner wrote:
> > Hi,
> > 
> > Just today, Thunderbird started throwing errors when accessing a particular
> > mail folder. Looking in the logs showed this:
> > 
> > dovecot: Aug 09 15:36:31 Error: IMAP(nmenere): Corrupted index file /imap/mailboxes/nmenere/shared-settings/jira-support/index/.INBOX.Triaged/dovecot.index: messages_count too large (51 > 39)

I am happy to report that this appears to have been user error. Every
time I upgraded dovecot, I have used either --program-suffix or --prefix
to make the binaries unique. However I had forgotten that there are paths
to binaries hardcoded in dovecot.conf:

protocol imap {
  mail_executable = /usr/local/libexec/dovecot/imap

so despite upgrades, I was using an 'imap' binary from 5 Nov 2005.

After fixing this, deleting the dovecot* index files, I am able to access
all the previously 'corrupt' Maildir folders that gave the error above.

Thanks for pointing me on the right track on the ACL thread. Hopefully
the binary version checking in RC7 will save people from this mistake in


> So how many files are there really?
> > In fact, the problem seems to be with the files in cur/. There are 51 in total,
> > and 39 of them have an 'i' flag:
> > 
> > 
> > 1155084961.P27685Q5.redback.sydney.atlassian.com:2,Sbrk
> > 1155084979.P27685Q6.redback.sydney.atlassian.com:2,Sbtk
> > 1155085103.P27685Q10.redback.sydney.atlassian.com:2,Sbwk
> > 1155085175.P28321Q1.redback.sydney.atlassian.com:2,Sbcki
> > 1155085221.P27685Q12.redback.sydney.atlassian.com:2,Sbwk
> > 1155085228.P28321Q4.redback.sydney.atlassian.com:2,Sbki
> > 1155085231.P28321Q5.redback.sydney.atlassian.com:2,Sbki
> > 1155085246.P28321Q6.redback.sydney.atlassian.com:2,Sbki
> All the lowercase a-z flags are Dovecot's keywords, which are listed in
> dovecot-keywords file (1=a, 2=b, etc.). If the file doesn't exist or the
> flag isn't listed in there, it's given a unknown-<number> name.
> Anyway, I tried to reproduce this problem but couldn't. Could you give
> me a list of all the files in the maildir that is broken? Does it break
> even if there are no dovecot* files at all? What if you do:
> rm ~/Maildir/.folder/dovecot*
> MAIL=~/Maidir /usr/local/libexec/dovecot/imap
> x select folder
> Does it print the same error message after select command?

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