nginx报： [error] 35171#0: *35 no live upstreams while connecting to upstream, client

nginx报错：“[error] 35171#0: *35 no live upstreams while connecting to upstream, client: 114.241.109.14, server: jiangxinyanyi.com, request: “GET /admin/index HTTP/1.1”, upstream: “https://www.jiangxinyanyi.com/admin/index”, host: “www.jiangxinyanyi.com””

问题： no live upstreams while connecting to upstream

错误方式：

upstream tomcat1{
			ip_hash;
			server 39.106.21.243:80; 
			server 39.106.4.96:80;
            }

解决方式：

upstream tomcat1{
			ip_hash;
			server 39.106.21.243:80 max_fails=5 fail_timeout=60s; #为5秒，不要改为1秒
			server 39.106.4.96:80 max_fails=5 fail_timeout=60s;
            }