Re: [exim] occasional SIGSEGV in exim4 under heavy load

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Author: Chris Lightfoot
Date:  
To: Marc Haber
CC: exim-users
Subject: Re: [exim] occasional SIGSEGV in exim4 under heavy load
On Tue, Jul 18, 2006 at 06:29:22PM +0200, Marc Haber wrote:
> On Wed, 12 Jul 2006 15:21:05 +0100, Chris Lightfoot
> <chris@???> wrote:
> >Under heavy SMTP load, we occasionally observe the exim4
> >daemon crashing (with the result that no further
> >connections can be accepted, obviously).'
>
> This seems to be a kernel issue, as it cannot be reproduced on any
> system running a Linux 2.6 kernel. The original poster uses Linux 2.4.
>
> See also the Debian BTS, http://bugs.debian.org/377857


I doubt it's a kernel issue, though a libc bug looks
probable. However, I haven't yet managed to reproduce it
outside exim, so I'm not sure of that yet.

Test code here (tell me if you can make it crash on linux
2.4 -- compile it with -lpthread):
    http://bitter.ukcod.org.uk/~chris/tmp/20060720/sigchld.c


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