[Dovecot] May 21 09:13:14 mail dovecot: imap-login: No authentication sockets found

I started getting this message this morning: May 21 09:13:14 mail
dovecot: imap-login: No authentication sockets found

Ive been runing dovecot on a fc6 dell poweredge 2950 for about 4 weeks
now with no issues. Im authenticating against openldap 2.3.27. It
appears ok. I restarted ldap, and dovecot, and everything looked fine
for a few minutes, then this started again. I have around 720 users.
Is there a setting in the dovecot.conf that I can use to fix this? Or
is the problem elsewhere?

-- Dwayne Hottinger Network Administrator Harrisonburg City Public Schools