config/1756: accept: (client socket): Operation not supported on t

[Jan Wedekind <ja...@wedekind.de>]

>Number:         1756
>Category:       config
>Synopsis:       accept: (client socket): Operation not supported on t
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Mon Feb  2 07:10:00 PST 1998
>Last-Modified:
>Originator:     jan@wedekind.de
>Organization:
apache
>Release:        1.2.4
>Environment:
OS: Solaris
	SunOS star5 5.5.1 Generic_103640-09 sun4u sparc SUNW,Ultra-1
  and
	SunOS star4 5.5.1 Generic_103640-12 sun4u sparc SUNW,Ultra-1

Compiler: GCC
Reading specs from /usr/local/lib/gcc-lib/sparc-sun-solaris2.5/2.7.2/specs
gcc version 2.7.2

Server:
	Server version Apache/1.2.4 (FrontPage/3.0.3)
>Description:
Since mid of december 97 we caught the following error for about 
 7-10 times with three different servers (all Version 1.2.4):

After restarting the server (via -HUP) the server fails to initialize
some clients, reporting the following message into the error log:

accept: (client socket): Operation not supported on transport endpoint

The server repeats to write this message into the logfile, 
until restarted (stop & start, not HUP).
So (of course) the first times of occuring, it killed our free disk space, 
writing of about 100000 lines of error_log / minute.

This problem may be related to Problem # 872 (already closed),
but under Solaris compiling with '#define USE_FCNTL_SERIALIZED_ACCEPT'
is the default since Version 1.2.0 (see CHANGES and conf.h)
>How-To-Repeat:
I'm sorry, but the error really rather seldom occured for now.
We aren't either available to repeat it.
>Fix:
Just a workaround (a small sh-skript to detect the error, restart the server
and complain about per e-mail). Called by cron very often after
midnight (log rotating) and automatically after reconfiguration of the 
server.

#!/bin/sh
 
err=/home/www/log/error_log
start=/home/www/httpd-name/start
stop=/home/www/httpd-name/stop
 
if tail -1 $err | grep "(client socket): Operation not supported" >/dev/null; th
en
        $stop
        $start 2>&1 >/tmp/checkclient.$$
        mailx -s "Warning: client socket error (restarted)" \
                root jw@de.uu.net </tmp/checkclient.$$
        rm /tmp/checkclient.$$
fi
%0
>Audit-Trail:
>Unformatted:
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ransport endpoint