imap: IOERROR: opening index mydomain.be!someuser: System I/O error

[Geert Janssens]

On Wednesday 23 September 2015 10:49:24 Geert Janssens wrote:
> Found this error message in the system journal for my kolab 3.4
> installation on centos:
> 
> imap: IOERROR: opening index mydomain.be!someuser: System I/O error
> 
> I have checked the imap folder for this user, but I don't see anything
> obviously wrong. Each directory in there has its index file and they
> are all owned by the cyrus system user.
> 
> The system has 10 users and only this one gives the error message.
> 
> Where does this come from ?
> 
> Thanks,
> 
> Geert

I found cyradm just now. It does list two mailboxes that are different 
from all the others.

Most mailboxes are like this:
user/geert op mydomain.be
user/geert/Trash op mydomain.be
and so on

Two mailboxes are like this
someuser
someuser op mydomain.be

So the latter is missing the "user" prefix while the former is even 
missing the domain name.

I suspect it's one or both of these that are causing the trouble. The 
are likely leftovers from an failed first installation attempt.

Trying to remove them in cyradm fails:
cyradm> dm someuser
deletemailbox: Permission denied

Checking permissions I see this:
cyradm> lam sysadmin 
anyone lrs

Ok, there are no delete permissions. Trying to change this:
cyradm> sam sysadmin anyone all 
setaclmailbox: anyone: lrswipkxtea: System I/O error

So I think the issue here is that I removed the directory on file system 
level already which confuses cyradm.

Perhaps recreating the directories would allow me to use cyradm to 
proceed to properly delete the mail folders.

But I don't know how cirus-imap maps mail boxes to the filesystem. For 
the working mailboxes I have them in
/srv/imap/default/domain/m/mydomain.be/g/geert

However the someuser mailbox doesn't have domain nor user prefix.

Does anyone know where I should expect these bad mailboxes ?

Thanks in advance,

Geert