[Dovecot] Problem with AUTH causes serverside lockup

[Tom Sommer]

Hello all,

I am running Dovecot alpha1, and after about 24 hours of the server 
working fine, it starts to lock up when I open Thunderbird to check mail.

Basically I can see new mail, but when I click it, it just hangs at 
"Loading message...".

I get the following in my maillog:

Aug 23 09:25:28 palantir dovecot: auth(default): client in: AUTH 
1       PLAIN   service=IMAP    lip=194.192.14.150      rip=80.197.147.147
Aug 23 09:25:28 palantir dovecot: auth(default): client out: CONT       1
Aug 23 09:25:28 palantir dovecot: auth(default): client in: AUTH 
1       PLAIN   service=IMAP    lip=194.192.14.150      rip=80.197.147.147
Aug 23 09:25:28 palantir dovecot: auth(default): client out: CONT       1
Aug 23 09:25:28 palantir dovecot: auth(default): client in: AUTH 
1       PLAIN   service=IMAP    lip=194.192.14.150      rip=80.197.147.147
Aug 23 09:25:28 palantir dovecot: auth(default): client out: CONT       1
Aug 23 09:25:28 palantir dovecot: auth(default): client in: CONT 
1       [BASE64 SUM]
Aug 23 09:25:28 palantir last message repeated 2 times
Aug 23 09:25:28 palantir dovecot: auth(default): client in: AUTH 
1       PLAIN   service=IMAP    lip=194.192.14.150      rip=80.197.147.147
Aug 23 09:25:28 palantir dovecot: auth(default): client out: CONT       1
Aug 23 09:25:28 palantir dovecot: auth(default): client in: AUTH 
1       PLAIN   service=IMAP    lip=194.192.14.150      rip=80.197.147.147
Aug 23 09:25:28 palantir dovecot: auth(default): client out: CONT       1
Aug 23 09:25:28 palantir dovecot: auth(default): client in: CONT 
1       [BASE64 SUM]

And then it just hangs untill it finally says

Aug 23 09:26:17 palantir dovecot: imap-login: Disconnected: Inactivity: 
method=plain, rip=80.197.147.147, lip=194.192.14.150

When I do:
# killall dovecot
# dovecot
(restarting dovecot)

then it works fine again.

--
Tom Sommer