nginx服务器出现如下信息：

[crit] 17221#0: accept4() failed (24: Too many open files)

[crit] 17221#0: accept4() failed (24: Too many open files)

[crit] 17221#0: accept4() failed (24: Too many open files)

[crit] 17221#0: accept4() failed (24: Too many open files)

[crit] 17221#0: accept4() failed (24: Too many open files)
原回是nginx进程打开文件数过多
 

解决方法：

修改/etc/security/limits.conf文件
* soft nofile 10240

* hard nofile 10240

星号代表全局，soft为软件，hard为硬件，nofile为这里指可打开文件数。

root soft nofile 10240

root hard nofile 10240

nobody soft nofile 10240

nobody hard nofile 10240
修改nginx.conf，添加如下代码：
worker_rlimit_nofile 10240;

重启nginx服务器。

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