nginx缓存无法正常工作

Question

我正在尝试在nginx中设置缓存（前端是tomcat），但缓存始终为空。 nginx.conf的内容在

之下

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /var/run/nginx.pid;

# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections  1024;
}


http {
    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  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;
    proxy_buffering                 on;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

  

    proxy_cache_path /path/to/cache levels=1:2 keys_zone=my_cache:10m max_size=10g
                 inactive=60m use_temp_path=off;
    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
        proxy_cache my_cache;
            proxy_pass http://127.0.0.1:8080;
        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }

    }

    include /etc/nginx/conf.d/*.conf;

}

目录/path/to/cache只有一个名为temp的目录被创建。在nginx上重复请求不会创建任何缓存，因为/path/to/cache为空。知道我在这里做错了什么