Apache - CentOS 7 - ошибка (24)Too many open files: AH02179: apr socket accept: (client socket)

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Apache - CentOS 7 - ошибка (24)Too many open files: AH02179: apr socket accept: (client socket)

Не запускается Apache на CentOS 7 с ошибкой:

(24)Too many open files: AH02179: apr_socket_accept: (client socket)

Вся проблема лимитах открытых файлах для даемона httpd:

# vi /lib/systemd/system/httpd.service
[Service]
.....
LimitNOFILE=100000

И вносим изменения:

# systemctl daemon-reload
# systemctl restart httpd