How to debug a situation where httpd is running but netstat shows Apache is not listening?
This is a server where I run two apaches (v2.2), one for my prod systems and one for dev, with separate IP addresses for prod and dev. Both listen on port 80.
Today when I tried to start my dev httpd, it started fine but I was unable to connect. nslookup indicates that DNS is okay. ps aux shows both apaches running, but netstat shows only prod is listening. I have confirmed that httpd.conf for dev server is loading and it contains correct Listen commands.
How can I debug this from here? How can Apache start but not listen?