It gets called when some imap process has left a lock file, but didn't clean it 
up (i.e. it crashed?). It means it cannot lock uidlist, but will notify if 
count of messages change.

It is not very simple to debug this kind of issue from outside.

Aki

> On 23 February 2018 at 13:53 Raffaele Gambelli 
> <r.gambe...@hitachi-systems-cbt.com> wrote:
> 
> 
> So you don't know when this piece of code is executed:
> 
> 
> 
> case MAILBOX_LOCK_NOTIFY_MAILBOX_OVERRIDE:                if 
> (storage->callbacks->notify_ok == NULL)
> break;                str = t_strdup_printf("Stale mailbox lock file 
> detected, "
> "will override in %u seconds", secs_left);
> storage->callbacks->notify_ok(&ibox->box, str,
> storage->callback_context);
> break;        }
> 
> 
> 
> 
> 
> > Also do you have some other process(es) that touch the mailbox?
> 
> 
> Without having access to this dovecot installation, I can't answer your 
> question, but which could be the problem if there were some other processes?
> 
> 
> 
> I try to reformulate question, is it possible that when dovecot sends that 
> notification, it blocks and don't send any other notifications like for 
> example when the count of messages in a folder is changed?
> 
> 
> Raffaele Gambelli
> 
> -----"dovecot" <dovecot-boun...@dovecot.org> ha scritto: -----
> Per: Raffaele Gambelli <r.gambe...@hitachi-systems-cbt.com>, 
> dovecot@dovecot.org
> Da: Aki Tuomi <aki.tu...@dovecot.fi>
> Inviato da: "dovecot" <dovecot-boun...@dovecot.org>
> Data: 23/02/2018 12.10PM
> Oggetto: Re: Stale mailbox lock file
> 
> Yes. I am one of them.
> 
> 
> 
> ---
> Aki Tuomi
> Dovecot oy
> 
> -------- Original message --------
> From: Raffaele Gambelli <r.gambe...@hitachi-systems-cbt.com>
> Date: 23/02/2018 12:25 (GMT+02:00)
> To: dovecot@dovecot.org
> Subject: Re: Stale mailbox lock file
> 
> Thanks Aki,
> 
> do you know if this list is read by dovecot developers team too? Could you 
> point me to the right list otherwise?
> 
> 
> Raffaele Gambelli
> 
> 
> 
> -----Aki Tuomi <aki.tu...@dovecot.fi> ha scritto: -----
> Per: Raffaele Gambelli <r.gambe...@hitachi-systems-cbt.com>
> Da: Aki Tuomi <aki.tu...@dovecot.fi>
> Data: 23/02/2018 11.22AM
> Cc: dovecot@dovecot.org
> Oggetto: Re: Stale mailbox lock file
> 
> 
> I have no idea how you'd even get that error then.
> 
> Aki
> 
> 
> On 23.02.2018 12:07, Raffaele Gambelli wrote:
> 
> >         Thanks but what answer it mean " doveconf -n"? 
> >         I have neither control nor access in the dovecot installation to 
> > which I'm connecting.
> > 
> >         I'm waiting to know the dovecot version but it could be that for 
> > legal reasons I will never receive it.
> > 
> >         So please, if you know it obviously, why and when a dovecot server 
> > sends that notice?
> > 
> >         Thanks, bye
> > 
> >         Raffaele Gambelli
> > 
> >         -----Aki Tuomi <aki.tu...@dovecot.fi> ha scritto: -----
> >           Per: Raffaele Gambelli <r.gambe...@hitachi-systems-cbt.com>, 
> > dovecot@dovecot.org
> >           Da: Aki Tuomi <aki.tu...@dovecot.fi>
> >           Data: 23/02/2018 10.54AM
> >           Oggetto: Re: Stale mailbox lock file
> > 
> > 
> > 
> > 
> >           On 23.02.2018 11:41, Raffaele Gambelli wrote:
> > 
> >               > >               Hi all,
> > >               I would like to understand the meaning of "Stale mailbox 
> > > lock file detected"
> > >               In index-storage.c ( 
> > > https://mis.dopa.go.th/atmail/server_source/dovecot/src/lib-storage/index/index-storage.c
> > >  ) there is this notice "Stale mailbox lock file detected" ...
> > > 
> > >               I have a java application which connects via javamail to a 
> > > dovecot server and I have some anomalies when that message comes.
> > > 
> > >               Thanks, bye
> > > 
> > >               Raffaele Gambelli
> > > 
> > > 
> > >           >           This is third email you've sent about this...
> > 
> >           doveconf -n
> > 
> >           Also do you have some other process(es) that touch the mailbox?
> > 
> >           Aki
> > 
> >       </dovecot-boun...@dovecot.org></aki.tu...@dovecot.fi>

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