nginx 网站突然访问不了的问题排查记录（Job for nginx.service failed because a configured resource limit was exceeded）

某一天，在浏览器开打网站，一直处于加载的状态，等待了许久都未进入页面，于是登陆服务器查看后端进程都正常，检查了证书也是正常的。

于是，尝试重启nginx：

[root@localhost ~]# systemctl restart nginx
Job for nginx.service failed because a configured resource limit was exceeded. See "systemctl status nginx.service" and "journalctl -xe" for details.

重启失败，那么说明问题出现在nginx无疑，得到以下信息：

nginx的启动服务失败，因为超过了配置的资源限制。参见"