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Date: Fri, 20 Jun 1997 10:48:48 -0600 (MDT)
From: Marc Slemko <marcs@znep.com>
To: hackers@FreeBSD.ORG
Subject: Re: Apache 1.1.3 and 1.2.0 problems under FBSD2.2.2
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On Fri, 20 Jun 1997, Josef Karthauser wrote:

> The continuing saga of a sick web machine :(
> 
> A brief history.  We're running a P200pro FBSD2.2.2 machine here as
> a virtual web server.  It currently has 130ish web servers running,
> each with their own IP address.
> 
> Where did the problem start?  I'm not sure, but it was some combination
> of reaching 124ish web servers, and hitting a certain number of active
> http connections.

Grr.  I thought this had been fixed in FreeBSD, but I guess not.
The problem here is that the FILE structure uses only a short for
_file, which means it can only handle 255 fds.  When Apache (or,
more likely, one of the library routines it calls) tries to access
a FILE structure the low fds are all taken already so it chokes.  

This should be fixed in FreeBSD.  It is in BSDI 2.1.  Haven't looked
to see how many side-effects there are in increasing the size...