Error since Dovecot v2.3.7

[Timo Sirainen]

On 15 Jul 2019, at 10.58, Paul Hecker via dovecot <dovecot at dovecot.org> wrote:
> 
> Hi,
> 
> since upgrading to Dovecot 2.3.7 I get the following new errors:

What was the old version? Did you upgrade your kernel as well?

> 2019-07-15 09:10:52 mail dovecot:  imap(paul at iwascoding.com)<32484><goWh8rKNSNZfqJ9R>: Error: file_lock_free(): Unexpectedly failed to retry locking /var/spool/mail/iwascoding/paul/mdbox/mailboxes/INBOX/dbox-Mails/dovecot-vsize.lock: fcntl(/var/spool/mail/iwascoding/paul/mdbox/mailboxes/INBOX/dbox-Mails/dovecot-vsize.lock, write-lock, F_SETLK) locking failed: No such file or directory

What filesystem are you using for mdboxes?

The lock fd is already open. Locking is not supposed to fail this way. Also I can't think of any recent changes that could be related to this. v2.2.36 already had the same locking code.