I've got a good one.
Once a week a run a cron job to (1) stop httpd, (2) move the previous
week's web log files to an analysis directory (to be munged later by
another script), and (3) start httpd again.
Everything works fine, for a while. Then, the httpd children die off and
I'm left with a single non-functioning httpd parent process.
Nothing informative in the httpd error_log file.
If I do the same 3 steps logged in as root everything works fine.
Yes, I've checked permissions on directories and scripts, to no avail.
Running Redhat Linux 2.0.32 and Apache_1.3.3