inaccessible mailbox for one user

[Lists Nethead]

Quoting Albert Shih <Albert.Shih at obspm.fr>:

> Le 10/10/2018 à 07:41:52+0200, Lists Nethead a écrit
>>
>> Quoting Albert Shih <Albert.Shih at obspm.fr>:
>>
>> > Le 09/10/2018 à 21:26:28+0200, Lists Nethead a écrit
>> >>
>> >> Quoting Lists Nethead <lists at nethead.se>:
>> >>
>> >> > > Hi,
>> >> > >
>> >> > > A user clicks on a mail in Horde IMP and next the inbox appears
>> >> > > completely empty. This message files all still there of course, but
>> >> > > the problem is that I cannot run any cyrus command on that mailbox,
>> >> > > reconstruct, chk_cyrus or anything.
>> >> > >
>> >> > > Is there a lock possibly sitting somewhere that prohibits running
>> >> > > any commands? Any other hints as to where I should start?
>> >> > >
>> >>
>> >> Restored users seen and sub files from backup, ran reconstruct again and
>> >> then I had to run unexpunge. Now user files are back but I see  
>> the following
>> >> error for this user in the logs
>> >>
>> >> IOERROR: conversations_audit on store
>> >>
>> >> Should I try sbin/ctl_conversationsdb -b ?
>> >
>> > I'm not a cyrus guru but, are you sure your FS are clean ? I'm running
>> > FreeBSD and long time ago I got a FS error without crash. It was  
>> a standard
>> > server (apache) and I got very strange error, like unable to remove file.
>> > I eventually restart the server and run a fsck -f manually to fix de
>> > problem. I never find out where and how I got that problem
>> >
>> > The FS was UFS2.
>> >
>> > I'm absolutly not sure it's the problem, just try to help.
>>
>> Thank you for your response.
>
> You'r welcome. And seem...my answer was not very usefull ;-)
>
>> Yes, I think the initial fault was not a Cyrus issue and the locking
>> problem vanished after the jail was restarted. Mail works ok now
>> except the error above.
>
> Did you find a solution ?
>
>> We run zfs so fsck is not of much help, but none of the pools report a
>> problem.
>
> We too, run FreeBSD + jail + ZFS (two, one for the mailbox on mechanical
> disk and another on ssd).
>

No solution found so far, still get "IOERROR: conversations_audit on  
store" on this account, tried all switches for ctl_conversationsdb.  
Currently out of ideas.