apache - Centos7 Httpd Server Hang -

i using centos7 when restart httpd service

systemctl restart httpd.service 

it show me error .

-- logs begin @ tue 2015-04-07 22:25:29 utc, end @ tue 2015-07-14 21:48:12 utc. -- jul 14 21:48:12 www.rise.global systemd[1]: starting apache http server... -- subject: unit httpd.service has begun start-up -- defined-by: systemd -- support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- unit httpd.service has begun starting up. jul 14 21:48:12 www.rise.global httpd[20042]: (98)address in use: ah00072: make_sock: not bind address [::]:80 jul 14 21:48:12 www.rise.global httpd[20042]: (98)address in use: ah00072: make_sock: not bind address 0.0.0.0:80 jul 14 21:48:12 www.rise.global httpd[20042]: no listening sockets available, shutting down jul 14 21:48:12 www.rise.global httpd[20042]: ah00015: unable open logs jul 14 21:48:12 www.rise.global systemd[1]: httpd.service: main process exited, code=exited, status=1/failure jul 14 21:48:12 www.rise.global kill[20043]: kill: cannot find process "" jul 14 21:48:12 www.rise.global systemd[1]: httpd.service: control process exited, code=exited status=1 jul 14 21:48:12 www.rise.global systemd[1]: failed start apache http server. -- subject: unit httpd.service has failed -- defined-by: systemd -- support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- unit httpd.service has failed. -- -- result failed. jul 14 21:48:12 www.rise.global systemd[1]: unit httpd.service entered failed state. 

i check in server no others services using 80 port using

[root@www ~]# netstat -tulpn | grep 80 tcp        0      0 0.0.0.0:48001           0.0.0.0:*               listen      2573/nimbus(spooler tcp        0      0 0.0.0.0:48000           0.0.0.0:*               listen      1412/nimbus(control tcp6       0      0 :::80                   :::*                    listen      9327/httpd udp        0      0 0.0.0.0:48000           0.0.0.0:*                           1412/nimbus(control udp6       0      0 fe80::225:90ff:fefa:123 :::*                                2747/ntpd udp6       0      0 fe80::225:90ff:fefa:123 :::*                                2747/ntpd 

i know solutions killall -9 httpd , restart server . dont have backup server , confuse . please advice me alternative ans safe steps @ situation.

i afraid downtime.

when give killall5 -9 httpd , disconnect ssh , need restart server web panel . after restart found nice.