Hiccup
Wow! That was weird. My web site was unavailable for about an hour this afternoon, till I noticed something amiss and restarted it.
From the logs, it looks like the trouble started at 16:49. The error_log shows
[Tue Feb 04 16:49:02 2003] [notice] child pid 12411 exit signal Bus error (10)
[Tue Feb 04 16:49:03 2003] [notice] child pid 12665 exit signal Bus error (10)
followed by a slew of such errors, up to 17:51, when I tried an apachectl restart. That didn’t work, and the error log recorded
Did an
[Tue Feb 04 17:51:25 2003] [notice] SIGHUP received. Attempting to restart
[Tue Feb 04 17:51:27 2003] [notice] seg fault or similar nasty error detected in the parent process
apachectl start, and it finally started up:
[Tue Feb 04 17:52:16 2003] [notice] Digest: generating secret for digest authentication ...
[Tue Feb 04 17:52:16 2003] [notice] Digest: done
[Tue Feb 04 17:52:17 2003] [warn] pid file /usr/local/apache2/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run?
[Tue Feb 04 17:52:17 2003] [notice] Apache/2.0.44 (Unix) DAV/2 PHP/4.3.0 configured -- resuming normal operations
In all these years, I’ve never had Apache die on me like that. Anyone know why it would suddenly up and die one sunny Tuesday afternoon?

Re: Hiccup
See http://dan.drydog.com/apache2php.html. Evidently, there is a problem when you have apache + PHP 4.5 + PCRE (regular expresions enabled) that causes this. I started getting it, too. Very annoying.