windwos 版本 Nginx upstream模块 长连接配置 出错:[emerg] 8300#10156: "keepalive" directive is not allowed here in \nginx-1.20.1/conf/nginx.conf:14，想使用长连接 但是配置后 直接启动不起来
配置文件如下：
worker_processes auto;
events {
worker_connections 1024;
}
stream {
upstream backend {
least_conn;
server 127.0.0.1:9902;
server 127.0.0.1:9903;
server 127.0.0.1:9904;
server 127.0.0.1:9905;
keepalive 16;
}
server {
listen 9900;
proxy_connect_timeout 5;
proxy_timeout 1200;
proxy_pass backend;
}
}