Yesterday I started to see (for the first time since upgrading to
cyrus-2.0.16 on Jan 4th) a lot of messages from sendmail which
indicated: "Could not connect to socket /var/imap/socket/lmtp:
Connection refused by localhost". I checked and there were no lmtpd
processes running, even though my cyrus.conf indicated a prefork=1 for
them. This, of course, really messes up our mail delivery, since mail
is coming in, but, it's not getting delivered. I stopped sendmail &
cyrus master, then started cyrus master & sendmail & it started up
fine. About 4 hours later, the same thing happened. Once again I went
through the restart process. I then rebooted our system around 6:00 pm
last night (students return today), and all was fine until around 1:30
this afternoon, when I started getting the same messages in syslog, but,
there were about 30 lmtpd's running (over 100 sendmail's). This time I
waited & after a few minutes lmtp would accept the connects, then reject
them, etc. Finally, I went through the restart process & it has been
running fine since.
Needless to say, I am very concerned about this. It sounds like I'm
running into a resource problem, but, I have checked swap, disk space,
memory usage, etc, and all seems fine. Is it possible that I need to
increase a network resource? Or maybe, tell master to increase his
listen queue on startup?
Here's the cyrus.conf file:
#
# cyrus.conf
#
# taken from prefork.conf as distributed with cyrus
# 20011010 - initial create date <crpeck>
#
START {
# do not delete these entries!
mboxlist cmd="ctl_mboxlist -r"
deliver cmd="ctl_deliver -r"
# this is only necessary if using idled for IMAP IDLE
# idled cmd="idled"
}
# UNIX sockets start with a slash and are put into /var/imap/sockets
SERVICES {
# add or remove based on preferences
imap cmd="imapd" listen="imap" prefork=5
imaps cmd="imapd -s" listen="imaps" prefork=1
pop3 cmd="pop3d" listen="pop3" prefork=5
pop3s cmd="pop3d -s" listen="pop3s" prefork=1
sieve cmd="timsieved" listen="sieve" prefork=0
# at least one LMTP is required for delivery
# lmtp cmd="lmtpd" listen="lmtp" prefork=0
lmtpunix cmd="lmtpd" listen="/var/imap/socket/lmtp" prefork=1
}
EVENTS {
# this is required
checkpoint cmd="ctl_mboxlist -c" period=30
# this is only necessary if using duplicate delivery suppression
delprune cmd="ctl_deliver -E 3" period=1440
}
Any suggesations on where to start would be appreciated...
-thanks
chris
Chris Peck
Manager of Unix Services
Information Technology
The College of William and Mary
Williamsburg, VA 23187
