咱们在启动 nginx时, 有可能遇到connect() failed (111: Connection refused) while connecting to upstream的问题。php
有时候nginx运行很正常,可是会发现错误日志中依旧有报错connect() failed (111: Connection refused) while connecting to upstream.nginx
通常状况下咱们的upstream都是fastcgi://127.0.0.1:9000. 形成这个问题的缘由大体有三个centos
netstat -ant | grep 9000
sudo /usr/local/php/sbin/php-fpm
pm.max_children修改大一点,重启php-fpm并观察日志状况