If you’re upgrading server software, or changing your port config, you may accidentally Funk your Wagnalls. You’ll know the error when you try to restart apache.
Apache is attempting to listen on port 8080, but cannot because it’s already in use. There are a few reasons why this might be happening.
If you have have duplicate
Listen entries, Apache will yell at you. Make sure that your apache.conf & ports.conf don’t both include this directive. If it’s only being listed once (see the example ports.conf below), then make sure you didn’t accidentally duplicate your ports.conf somewhere apache would notice.
Remember to dig in and evaluate server problems instead of just rebooting. I rebooted four times before I decided that I must have screwed something up.