I've been having some problems with IMAP user connections to the Dovecot (v2.0.8) server. The following message is being logged.
Jan 16 10:51:36 postal dovecot: master: Warning:
service(imap-login): process_limit reached, client connections are
being droppedThe server is running Red Hat Enterprise Linux release 4 (update 6). Dovecot is v2.0.8.
We have only 29 user accounts in /etc/dovecot/users. There were 196 "dovecot/imap" processes and 6 other dovecot processes, for a total of 202 "dovecot" processes, listed in the 'ps aux' output when problems were being experienced.
Stopping and restarting the Dovecot system fixes the problem -- for a while.
The 'doveconf -n' output is attached. I have not set any "process_limit" values, and I don't think I'm getting anywhere close to the 1024 default, so I'm pretty confused as to what might be wrong.
Any suggestions on what to do next are appreciated.
Thanks,
- Don
# 2.0.8: /etc/dovecot/dovecot.conf # OS: Linux 2.6.9-67.0.1.ELsmp i686 Red Hat Enterprise Linux WS release 4 (Nahant Update 6) ext3 auth_username_format = %Lu auth_verbose = yes auth_verbose_passwords = sha1 login_log_format_elements = user=<%u> service=%Us method=%m rip=%r lip=%l mpid=%e %c login_trusted_networks = xx.xx.xx.0/24 mail_location = maildir:/Virtual_Users/%u/Mail passdb { args = scheme=CRYPT username_format=%u /etc/dovecot/users driver = passwd-file } passdb { driver = pam } ssl_ca =