Apache will not come back up - httpd dead but subsys locked

Question

I'm hoping someone can help me fairly urgently.
I've been trying to get me Centos server back up and running.

I did a yum update yesterday which went as planned, but this morning I've found that httpd is dead (I'm guessing on logrotate).

I can issue a "service httpd start" and it appears to start OK but status reveals "httpd dead but subsys locked".
I can remove the subsys lock and start again but then I get:
"(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs"

Then running netstat -plant shows httpd running on

tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 8191/httpd
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN 8191/httpd

I can remove Listen 80 from my httpd.conf and this removes the first error but it then displays: "(98)Address already in use: make_sock: could not bind to address 0.0.0.0:443
no listening sockets available, shutting down
Unable to open logs"

There's no entry for 443 in my conf?

Having also run tail -f /var/log/messages I get one worrying entry:
www kernel: httpd[8189]: segfault at 0 ip b7367c48 sp bf89f4fc error 4 in libc-2.5.so[b72f8000+152000]

Any thoughts please?

Yours, Chris

Answer 1

You probably still have httpd running on port 80 en 443. Try pkill httpd; or pkill -9 httpd
Then run netstat -plant again and check if httpd on port 80 and 443 is gone.
Now start apache again.

You say you don't have 443 in your config, what does "grep -ril 443" /etc/apache2 say?

Answer 2

you can also check if there are any processes bound to 443 with lsof -i tcp:443 ; then you can kill the process or find the offending service.