502 解决：[WARNING] fpm_children

查过网上的资源，基本都是认为是php线程打开文件句柄受限导致的错误。具体的解决的办法如下：

1、提升服务器的文件句柄打开打开

/etc/security/limits.conf : (增加)

* soft nofile 51200

* hard nofile 51200

# vi /etc/security/limits.conf 加上
* soft nofile 51200
* hard nofile 51200

2、提升nginx的进程文件打开数

nginx.conf : worker_rlimit_nofile 51200;

3、修改php-fpm.conf文件，主要需要修改2处。

命令 ulimit -n 查看限制的打开文件数，php-fpm.conf 中的选项rlimit_files 确保和此数值一致。

4、

# vi /etc/sysctl.conf
底部添加
fs.file-max=51200

start_servers和max_spare_servers 可以避免一定情况下的502频繁错误

转载于:https://www.cnblogs.com/jking10/p/4549133.html

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