[Dovecot] Dovecot v1.1.alpha4 problem

[Vladislav Malyshkin]

The problem persists with mbox inbox folders in v1.1.alpha4.
I get a stalled process "imap" which can not be killed by
killall imap
only by
killall -9 imap
This process takes a lock of user mailbox thus prevents the user to 
read/send mail.
Other users are OK

 
Vladislav Malyshkin wrote:
> Dovecot v1.1.alpha4 imap after some time stops responding.
> It can not be restarted as
> /etc/init.d/dovecot restart
>
> killall imap
> also does not help
>
> killall -9 imap
> and then restart does help
>
> in log I see message (repeted periodically) that
> Sep 12 09:50:02 localhost postfix/local[22533]: C7057753B6: 
> to=<username at domain>
> , relay=local, delay=5195, delays=5156/0.01/0/39, dsn=4.2.0, 
> status=deferr
> ed (cannot update mailbox /home/username/Mailbox for user username. 
> unable to lo
> ck for exclusive access: Resource temporarily unavailable)
>
> lsof -n shows that the file is is open by imap process.
>