[dkim-milter-discuss] warning: connect to Milter service unix:/var/run/dkim-filter/dkim-filter.sock: No such file or directory

[Micah A. <mi...@ri...>]

Everything seems fine on my dkim signing service. However, every hour, almost exactly at the same time, I get this error
in my logs:

Aug 26 14:02:45 mx2 postfix/cleanup[12057]: warning: connect to Milter service unix:/var/run/dkim-filter/dkim-filter.sock: No such file or
directory

It goes away, only to come back at :02 after the hour again next hour. 

I have no cronjobs running on this machine at all, and nothing else
happening at a regular hourly interval. 

I don't want to ignore this error, because when dkim-milter *does*
crash, I get quite a few of these messages, and that notifies me that
the daemon needs to be restarted. However, seeing this message once an
hour is a bit annoying.

I'm using postfix, and the following in my main.cf:

non_smtpd_milters = unix:/var/run/dkim-filter/dkim-filter.sock

The dkim-milter process runs like this:

108      11255  0.0  0.0  19892  1704 ?        Ssl  Aug21   0:10 /usr/sbin/dkim-filter -x /etc/dkim-filter.conf -u dkim-filter -P /var/run/dkim-filter/dkim-filter.pid -p local:/var/run/dkim-filter/dkim-filter.sock -l -i /etc/dkim-sign -c relaxed/simple -S rsa-sha1 -d mydomain.net -D -s myselector

The dkim-filter.conf file is pretty minimal:

Syslog                  yes
SyslogSuccess           yes
UMask                   002
Domain                  *.mydomain.net
KeyFile                 /etc/certs/dkim/myselector.key.pem
Selector                myselector
Mode                    s
SubDomains              yes
Statistics              /var/run/dkim-filter/dkim-stats

As you can see from the process list above, the dkim-filter process has
been running for 7 days, so it is not being restarted every hour.

Any ideas what could be causing this, and how I could make it stop? 

thanks!
micah