Re: pop3 CLOSE_WAIT hang

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• In reply to: tloudev: "pop3 CLOSE_WAIT hang"
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On Tue, 3 Apr 2007, tloudev wrote:

> hi,
> I have serious problem with my cyrus21 (debian sarge 2.1.18-1) - I have
> hundreds of connectin in CLOSE_WAIT state.
> I can telnet to port 110 , but sometimes I can't even get the banner of the
> service.
> I tried to increase maxchild (now -1 - unlimited), I tried babysit,
> increasing maxfds up to 2000 etc, but it still doesn't kick out the
> CLOSE_WAIT state connections. Any suggestion?
> Thank you
> Ondrej Pachner

I don't run POP here, but you might search the mailing list archives for
information about running out of entropy for POP (using /dev/urandom
instead of /dev/random). If I remember correctly, each POP connection
requires a certain amount of entropy from /dev/random. When you run out
of available entropy, POP will hang waiting for more.

The list archives should have some more information, or hopefully someone
else can chime in. :)

         Andy

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• Previous message: (no name): "Murder / frontend does not connect to backend"
• In reply to: tloudev: "pop3 CLOSE_WAIT hang"
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