I'm experiencing a very weird problem involving mod_ssl and desperately hope
that anyone can help/hint on this.
DESCRIPTION:
Apache dies apparantly at random occasions. The root-thread dies and all
it's children slowly timeout one by one. There is *no* sign at all in the
logs, no error message, no common circumstance either in apache-logs or
systemlogs. Not even a "caught ???TERM, shutting down", it just stops
logging and dies. The coredump shows it's a segfault. Everything else on the
machine works very well, and so does Apache when it's running. One thing I
have discovered though is that restarting Apache (either via "apachectl
stop/start" or "apachectl gracful") appears to increase instability. The
machine we are currently adding more customers to is much more instable
since Apache is restarted frequently. I've tried compiling without
mod_throttle, thinking that an error occured due to my fiddling with its
source - no luck, Apache keeps crashing.
Since Apache segfaults some 30-50 times each day, I had to write a small
script which is run by cron each minute, restarting Apache each time it
crashes. Not so good.
I'm asking on the mod_ssl-list because the problem-report closest matching
our problem is in the announcement of mod_ssl-2.4.8-1.3.9. This makes me
think it might have to do with mod_ssl.
SETUP:
We're currently using mod_ssl 2.4.8 on 3 similar machines with this setup:
- Linux Slackware 4.0, kernel 2.2.12 / 2.2.13ac2
- Apache 1.3.9
- mod_perl/1.21
- PHP/4.0b3
- mod_ssl/2.4.8
- OpenSSL/0.9.4
- mod_throttle-2.06
Each machine has approx. 1100 VirtualHosts
mod_throttle is patched to accept up to 2500 VirtualHosts,
apache/src/httpd.h has HARD_SERVER_LIMIT raised to 1024. All limits in
httpd.conf are set high, so are the ulimits f�r the process. I don't beleive
there's a problem with file-descriptors or max-processes, since that tends
to cause an error-message in the system-logs (?).
I'd really appreciate some help on this, I don't know what to do next.
Best regards,
Johan Ekenberg - Sweden
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