[Dovecot] Dovecot hung or what?

[Odhiambo WASHINGTON]

Here is my first major problem with dovecot. I am running rc15 on 
FreeBSD 6.1. I run dovecot supervised by DJB's daemontools.
I run only the pop3 service.

A colleague informed me that pop3 service was simply not responding.
They could not rcv mail. When I checked the server, tail-ing 
dovecot.log, here is what was scrolling:

[wash at nbi ~]$ tail -f /var/log/dovecot.log
dovecot: Nov 23 18:04:11 Info: pop3-login: Disconnected: Inactivity: rip=196.200.37.94, lip=62.8.64.64
dovecot: Nov 23 18:04:11 Info: pop3-login: Disconnected: Inactivity: rip=196.200.42.212, lip=196.200.36.2
dovecot: Nov 23 18:04:12 Info: pop3-login: Disconnected: Inactivity: rip=196.200.35.130, lip=62.8.64.64
dovecot: Nov 23 18:04:13 Info: pop3-login: Disconnected: Inactivity: rip=168.144.108.27, lip=62.8.64.64
dovecot: Nov 23 18:04:14 Info: pop3-login: Disconnected: Inactivity: rip=168.144.108.8, lip=62.8.64.64
dovecot: Nov 23 18:04:17 Info: pop3-login: Disconnected: Inactivity: rip=196.200.39.169, lip=62.8.64.64
dovecot: Nov 23 18:04:17 Info: pop3-login: Disconnected: Inactivity: rip=41.220.126.2, lip=196.200.38.2
dovecot: Nov 23 18:04:17 Info: pop3-login: Disconnected: Inactivity: rip=196.200.39.169, lip=62.8.64.64
dovecot: Nov 23 18:04:18 Info: pop3-login: Disconnected: Inactivity: rip=196.200.37.174, lip=62.8.64.64
dovecot: Nov 23 18:04:19 Info: pop3-login: Disconnected: Inactivity: rip=196.216.68.230, lip=62.8.64.64
dovecot: Nov 23 18:04:22 Info: pop3-login: Disconnected: Inactivity: rip=196.200.45.54, lip=62.8.64.64
dovecot: Nov 23 18:04:26 Info: pop3-login: Disconnected: Inactivity: rip=196.200.35.130, lip=62.8.64.64
dovecot: Nov 23 18:04:27 Info: pop3-login: Disconnected: Inactivity: rip=196.200.45.54, lip=62.8.64.64
dovecot: Nov 23 18:04:28 Info: pop3-login: Disconnected: Inactivity: rip=41.220.126.2, lip=62.8.64.64
dovecot: Nov 23 18:04:28 Info: pop3-login: Disconnected: Inactivity: rip=196.207.23.28, lip=62.8.64.64
dovecot: Nov 23 18:04:31 Info: pop3-login: Disconnected: Inactivity: rip=82.109.38.129, lip=62.8.64.64
dovecot: Nov 23 18:04:32 Info: pop3-login: Disconnected: Inactivity: rip=41.222.12.121, lip=196.200.36.2
^C
[wash at nbi ~]$  su
Password:
nbi# sh /usr/local/etc/rc.d/svscan.sh stop
Stopping svscan.
nbi# sh /usr/local/etc/rc.d/svscan.sh start
Starting svscan.

I then restarted the service ....

nbi#
nbi# tail -f /var/log/dovecot.log
dovecot: Nov 23 18:04:47 Info: pop3-login: Disconnected: Shutting down: rip=196.200.37.126, lip=62.8.64.64
dovecot: Nov 23 18:04:47 Info: pop3-login: Disconnected: Shutting down: rip=196.200.39.74, lip=62.8.64.64
dovecot: Nov 23 18:04:47 Info: pop3-login: Disconnected: Shutting down: rip=196.200.35.146, lip=62.8.64.64
dovecot: Nov 23 18:04:47 Info: pop3-login: Disconnected: Shutting down: rip=196.200.37.42, lip=62.8.64.64
dovecot: Nov 23 18:04:47 Info: pop3-login: Disconnected: Shutting down: rip=196.200.46.122, lip=62.8.64.64
dovecot: Nov 23 18:04:50 Info: Dovecot v1.0.rc15 starting up


After this, dovecot was now answering as expected.

1. What could the problem be?
2. How can I reproduce it.

PS: This has never happened ever since with the previous versions.



-Wash

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