[Dovecot] imap-login: Disconnected: Connection queue full

[Timo Sirainen]

On Wed, 2007-05-16 at 12:42 +0200, Ralf Hildebrandt wrote:
> I'm getting "imap-login: Disconnected: Connection queue full:"
> messages like these:
> 
> May 16 12:17:26 postamt dovecot: imap-login: Disconnected: Connection queue full: rip=160.45.172.202, lip=141.42.4.250
> May 16 12:17:26 postamt dovecot: imap-login: Disconnected: Connection queue full: rip=141.42.165.160, lip=141.42.4.250, TLS
> May 16 12:18:23 postamt dovecot: imap-login: Disconnected: Connection queue full: rip=193.175.70.61, lip=141.42.4.250
> 
> Should I worry about these messages or are they of informational
> character only?
> 
> Does it mean that the imap-login encountered more than
> "login_max_connections" and thus a new process had to be spawned?

No. It means that it disconnected a client that wasn't yet logged in
because login_max_connections was reached. It should happen only if
login_max_processes_count was reached. Perhaps there's still a bug
somewhere in there.. How many imap-login processes do you have running?
Increasing login_processes_count probably helps for now.

> login_process_per_connection: no
> login_max_connections: 32

With these settings it should have allowed 32*128 connections / ssl
proxies until the connection queue full error would have happened.

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