In RHEL 7.x, httpd service failed to restart manually due to timeout.

Issue

The httpd service failed to restart with the following errors.

[root@localhost ~]# time systemctl restart httpd
Job for httpd.service failed because a fatal signal was delivered to the control process. See "systemctl status httpd.service" and "journalctl -xe" for details.

Checking status of httpd service as below, there are operation timed out and stop-final-sigterm timed out and then httpd service was terminated and killed when starting it.

[root@localhost ~]# systemctl status httpd.service
httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
Active: failed (Result: signal) since Mon 2018-01-08 17:03:30 KST; 22s ago
Docs: man:httpd(8)
      man:apachectl(8)

Process: 20863 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=killed, signal=KILL)
Main PID: 20863 (code=killed, signal=KILL)
CGroup: /system.slice/httpd.service

Jan 08 17:00:29 hostname systemd[1]: Starting The Apache HTTP Server...
Jan 08 17:01:59 hostname systemd[1]: httpd.service start operation timed out. Terminating.
Jan 08 17:03:30 hostname systemd[1]: httpd.service stop-final-sigterm timed out. Killing.
Jan 08 17:03:30 hostname systemd[1]: httpd.service: main process exited, code=killed, status=9/KILL
Jan 08 17:03:30 hostname systemd[1]: Failed to start The Apache HTTP Server.
Jan 08 17:03:30 hostname systemd[1]: Unit httpd.service entered failed state.
Jan 08 17:03:30 hostname systemd[1]: httpd.service failed.