El servicio Nginx falla aleatoriamente: falló con el resultado 'start-limit-hit'

El servicio Nginx falla aleatoriamente: falló con el resultado 'start-limit-hit'

He experimentado que el servicio Nginx falla en momentos aleatorios y no estoy seguro de por qué.

syslogme da lo siguiente, al hacer un cat syslog | grep:

Aug 23 00:00:06 serv4 systemd[1]: nginx.service: Succeeded.
Aug 23 00:00:06 serv4 systemd[1]: nginx.service: Failed to parse PID from file /run/nginx.pid: Invalid argument
Aug 23 00:00:06 serv4 systemd[1]: nginx.service: Succeeded.
Aug 23 00:00:06 serv4 systemd[1]: nginx.service: Failed to parse PID from file /run/nginx.pid: Invalid argument
Aug 23 00:00:06 serv4 systemd[1]: nginx.service: Succeeded.
Aug 23 00:00:06 serv4 systemd[1]: nginx.service: Failed to parse PID from file /run/nginx.pid: Invalid argument
Aug 23 00:00:06 serv4 systemd[1]: nginx.service: Succeeded.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Succeeded.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Failed to parse PID from file /run/nginx.pid: Invalid argument
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Succeeded.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Start request repeated too quickly.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Failed with result 'start-limit-hit'.
Aug 23 00:00:07 serv4 logrotate[1506419]: Job for nginx.service failed.
Aug 23 00:00:07 serv4 logrotate[1506419]: See "systemctl status nginx.service" and "journalctl -xe" for details.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Start request repeated too quickly.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Failed with result 'start-limit-hit'.
Aug 23 00:00:07 serv4 logrotate[1506425]: Job for nginx.service failed.
Aug 23 00:00:07 serv4 logrotate[1506425]: See "systemctl status nginx.service" and "journalctl -xe" for details.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Start request repeated too quickly.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Failed with result 'start-limit-hit'.
Aug 23 00:00:07 serv4 logrotate[1506430]: Job for nginx.service failed.
Aug 23 00:00:07 serv4 logrotate[1506430]: See "systemctl status nginx.service" and "journalctl -xe" for details.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Start request repeated too quickly.
Aug 23 00:00:07 serv4 systemd[1]: nginx.service: Failed with result 'start-limit-hit'.

nginx -tme da lo siguiente:

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

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