httpd (no pid file) not running while restarting apache

Question

I am working on ubuntu. I got the error messages while try to restart apache.

root@XXX:/etc/init.d# sudo /etc/init.d/apache2 restart
 * Restarting web server apache2                                                                                                              apache2: Could not reliably determine the server's fully qualified domain name,                                                               using xxx.xxx.xx.xxx for ServerName
httpd (no pid file) not running
apache2: Could not reliably determine the server's fully qualified domain name,                                                               using xxx.xxx.xx.xxx for ServerName
(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

I got the following message when tried netstat -pant

tcp        0   0 0.0.0.0:80              0.0.0.0:*               LISTEN      0          32748       9950/httpd

tcp      429      0 xxx.xxx.xx.xxx:80       xxx.xxx.xx.xxx:xxxxx    CLOSE_WAIT  0          0          

Solution 1

Use lsof -i :80 {check if the parameter is correct). It's listing all the application that are listening on port 80.

Also try to run apache2 {directly the executable} to check what is happening.

Solution 2

Just kill apache pid ( i think that its 'kill 9950' )

and then try /etc/init.d/apache2 start

Solution 3

From some other people's post, it's due to some applcation binds port 80, so just issue 'killall httpd' then a 'apachectl start' to make things alll normal again.

Comments

[user5950302]

I have tried it but apache2 start shows same errors

[Arenstar]

You need to kill what ever is running on port 80... The PID complaint is only because you are trying to stop something that hasnt written a pid.. ( not important ) Is this an aptitude install? Or a precompiled version of apache?

[Saurabh Barjatiya]

If kill does not work you can also try 'killall -9 httpd', verify using 'ps -C httpd' that process got killed and then use '/etc/init.d/apache2 start'.

[Michael Hampton]

And after that, then what?

[KeitelDOG]

After upgrade from High Sierra to Catalina in MacOs, same thing, seems like a bug. After running sudo killall -9 httpd, the built-in apache stop serving. sudo apachectl stop never stop it, but sudo apachectl start will start it.

[KeitelDOG]

Realizing that apachectl will auto-restart each time I killall httpd. The way I stopped it was to unload it from launchctl: sudo launchctl unload /System/Library/LaunchDaemons/org.apache.httpd.plist