[cobalt-users] POP3 down - port already in use?

[Parker Morse <morse@xxxxxxxxxxx>]

So, this morning I come in and find that POP3 has died on my Qube3. As 
best I can tell from the logs and from Active Monitor, it stopped 
responding around 10 PM EST last night, give or take half an hour. 
Everything else appears to be running properly.

I tried restarting POP in the GUI (uncheck the box, click "Save", recheck 
the box, click "Save" again). No good. I also tried restarting inetd from 
within SSH: #/etc/rc.d/init.d/inet restart . Also no good.

The output of "netstat -tpa" includes a lot of this:

tcp        1      0 bluebird-eth1.sina:pop3 10.6.18.55:3576         
CLOSE_WAIT  -

...with 10.6.18.55 being a local client, and the port numbers varying. 
There are close to 100 lines of this in netstat! Since there is no process 
number shown, I can't close down the processes.

I'm seeing things like this in the log when I attempt to restart POP:

May  2 09:09:51 bluebird inetd[14078]: pop-3/tcp: bind: Address already in 
use

When I telnet to the server on port 110, I get a "connected" message, but 
no qpopper banner and no response to commands.

Are these earlier connections bound up in CLOSE_WAIT what's choking popd? 
The load averages are pretty tiny right now - it just doesn't respond to 
POP connections. Client MTAs connect, then time out trying to authenticate.

What else should I try?

I've got my users on webmail now, but I'd love to figure out how to bring 
back POP function without rebooting the box.

Thanks,

pjm