net_connect_unix(/var/run/dovecot/stats-writer) failed: Permission denied

[Richard Hector]

Hi, I'm seeing the same, but I think it's every time the lda is called 
to deliver mail to a mailbox. Postfix runs it as vmail:vmail.

My socket is owned by root:dovecot (on Debian buster).

Should I add vmail to the dovecot group to enable it to write? Or is 
changing the socket to 0666 safer?

I'm also a little confused, because according to
https://doc.dovecot.org/configuration_manual/stats/ no statistics are 
logged by default, and I have no mentions of 'metric' anywhere in my 
config, so why is the write even attempted? (dovecot 2.3.4)

Cheers,
Richard

On 24/10/20 4:46 am, Aki Tuomi wrote:
> Hi!
> 
> You can ignore it, or you can change the socket permissions to 0666.
> 
> service stats {
>     unix_listener stats-writer {
>        mode = 0666
>     }
> }
> 
> Aki
> 
> 
>> On 23/10/2020 17:52 mj <lists at merit.unu.edu> wrote:
>> 
>>  
>> Hi,
>> 
>> Nobody?
>> 
>> It happens so rarely, and the system appears to be running fine 
>> otherwise, should I just ignore it?
>> 
>> Still makes me wonder way it would happen at all..?
>> 
>> MJ
>> 
>> On 10/22/20 12:53 PM, mj wrote:
>> > Hi,
>> > 
>> > We are getting very occasional messags from dovecot:
>> > 
>> >> net_connect_unix(/var/run/dovecot/stats-writer) failed: Permission denied
>> > 
>> > Over the last week, the message appeared five times. (on a mail server 
>> > with over 100 users, to that's basically almost never)
>> > 
>> > doveconf -n below
>> > 
>> >> # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf
>> >> # Pigeonhole version 0.5.4 ()
>> >> # OS: Linux 4.19.0-10-amd64 x86_64 Debian 10.6 xfs
>> > 
>> > snip...
>> > 
>> >> service stats {
>> >>   unix_listener stats-reader {
>> >>     group = vmail
>> >>     mode = 0660
>> >>     user = vmail
>> >>   }
>> >>   unix_listener stats-writer {
>> >>     group = vmail
>> >>     mode = 0660
>> >>     user = vmail
>> >>   }
>> >> }
>> > 
>> > and the on-disk permissions are:
>> > 
>> >> root at dovecot:~# ls -l /var/run/dovecot/*stat*
>> >> srw------- 1 root  root  0 Oct  6 00:25 /var/run/dovecot/old-stats
>> >> prw------- 1 root  root  0 Oct  6 00:25 /var/run/dovecot/old-stats-mail
>> >> prw------- 1 root  root  0 Oct  6 00:25 /var/run/dovecot/old-stats-user
>> >> srw-rw---- 1 vmail vmail 0 Oct  6 00:25 /var/run/dovecot/stats-reader
>> >> srw-rw---- 1 vmail vmail 0 Oct  6 00:25 /var/run/dovecot/stats-writer
>> > 
>> > We're not sure what makes the Permission denied error happen...
>> > 
>> > Anyone with an idea?
>> > 
>> > MJ
>