Re: [Exim] Re: exim-3.35: Stuck messages (hung delivery proc…

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Author: Philip Hazel
Date:  
To: Sheldon Hearn
CC: exim-users
Subject: Re: [Exim] Re: exim-3.35: Stuck messages (hung delivery processes)
On Wed, 20 Mar 2002, Sheldon Hearn wrote:

> Oops, I misread the BSD kdump(1) output. On return from writing to
> exim-process.info, the hung Exim process called recvfrom(2) on fd 8,
> which fstat(1) tells me is a UDP socket; FreeBSD's sockstat(1) shows
> that this is a DNS query.
>
> It makes the call to recvfrom(2) without setting any kind of alarm.


In that case, the problem is in your resolver. Exim just calls the
resolver, and assumes that it will handle timeouts etc itself and yield
TRY_AGAIN if it hits one. It certainly does this in some circumstances
(that is, on some systems, using some resolvers).

--
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.