Nginx can't reload even when config is OK

[tamer1009]

Hello everybody,

I have been working with Nginx for quite a long time, but I have stumbled
upon a very strange error.
Nginx is compiled from source on CentOS 7.

All systemctl commands work, except the reload function.
Job for nginx.service failed because the control process exited with error
code. See "systemctl status nginx.service" and "journalctl -xe" for
details.

I have already tried to do the actions manually, which seemed to be working.
The
/bin/kill -s HUP $MAINPID

systemctl status nginx.service -l gives me:
nginx.service - The nginx HTTP and reverse proxy server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; vendor
preset: disabled)
   Active: active (running) (Result: exit-code) since Sat 2017-11-18
08:17:14 EST; 1min 34s ago
  Process: 22036 ExecReload=/bin/kill -s HUP (code=exited,
status=1/FAILURE)
  Process: 22025 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)
  Process: 22020 ExecStartPre=/usr/sbin/nginx -t (code=exited,
status=0/SUCCESS)
  Process: 22018 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited,
status=0/SUCCESS)
 Main PID: 22028 (nginx)
CGroup: /system.slice/nginx.service
22028 nginx: master process /usr/sbin/ngin
22029 nginx: worker proces

Nov 18 08:17:21 host kill[22036]: -s, --signal <sig>     send specified
signal
Nov 18 08:17:21 host kill[22036]: -q, --queue <sig>      use sigqueue(2)
rather than kill(2)
Nov 18 08:17:21 host kill[22036]: -p, --pid              print pids without
signaling them
Nov 18 08:17:21 host kill[22036]: -l, --list [=<signal>] list signal names,
or convert one to a name
Nov 18 08:17:21 host kill[22036]: -L, --table            list signal names
and numbers
Nov 18 08:17:21 host kill[22036]: -h, --help     display this help and exit
Nov 18 08:17:21 host kill[22036]: -V, --version  output version information
and exit
Nov 18 08:17:21 host kill[22036]: For more details see kill(1).
Nov 18 08:17:21 host systemd[1]: nginx.service: control process exited,
code=exited status=1
Nov 18 08:17:21 host systemd[1]: Reload failed for The nginx HTTP and
reverse proxy server.

nginx -t are passed successfully. The logs don't provide any information.
Config is default config.

Does anybody know where I have to look now?

Thanks!

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,277379,277379#msg-277379