I ran into this issue where I wasn’t able to start my httpd after my latest change.

To solve this, I first run “ps -aux|grep httpd” to see any httpd processes running at this point.

Then I found soem phntom process running as apache user but don’t have a command associated with it, so I decide to kill these process by using “kill -9 [process id]“.

After doing this, I stop and start the httpd with “service httpd stop” & “service httpd start”.

Finally, the apache server start and running again.