nginx 请求后端服务，频繁卡 1 分钟

前端或 postman 调用 nginx 代理的后端接口，会频繁的卡一分钟（ 1m 0.16s ，正常请求 100ms 左右）。

服务端是在 100ms 左右就处理完成，并返回了响应日志，直接请求后端接口也是正常的 100ms

#user nobody; worker_processes 4;

events { use epoll; worker_connections 65535; }

http { include mime.types; default_type application/octet-stream;

#log_format main '$remote_addr - $remote_user [$time_local] "$request" ' # '$status $body_bytes_sent "$http_referer" ' # '"$http_user_agent" "$http_x_forwarded_for"'; #access_log logs/access.log main; sendfile on; #tcp_nopush on; underscores_in_headers on; keepalive_timeout 180; #gzip on; include cnf/upstream_*.cnf; server { listen 80; server_name localhost; include cnf/pathrule.cnf; #charset koi8-r; #access_log logs/host.access.log main; location / { root html; index index.html index.htm; } error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } } 

}