jujiale opened a new issue, #7631: URL: https://github.com/apache/apisix/issues/7631
### Description hello , I use apisix v2.12 do some test, I have installed apisix-base, but I meet some question,the following is my config. my upstream is a openresty(172.25.xxx.xxx) ,the openresty keepalive_timeout is 10s , when I visit http://172.25.xxx.xxx:9000:9000/test, it could return a simple string. ` { "id": "414195977881125816", "create_time": 1656409641, "update_time": 1660009873, "uri": "/test", "name": "jujiale-test", "methods": ["GET", "POST", "PUT", "DELETE", "PATCH", "HEAD", "OPTIONS", "CONNECT", "TRACE"], "plugins": { "prometheus": { "disable": false, "prefer_name": true } }, "upstream": { "nodes": { "172.25.xxx.xxx:9000": 1 }, "timeout": { "connect": 6, "send": 6, "read": 6 }, "type": "roundrobin", "schtheme": "http", "pass_host": "pass", "keepalive_pool": { "idle_timeout": "60s", "requests": 1000, "size": 320 } }, "status": 1 } ` with above config , I use tcpdump do packet capture in apisix server, "sudo tcpdump -i any host 172.25.xxx.xxx and dst port 9000 -w 111.pcap". then I visit uri "/test" in apiisx with curl. the request sent to upstream OK. but when I use wireshark open 111.pcap, it appears many three-handshaking, then I cutdown idle_timeout from 60s to 5s in order to be smaller than 10s in openresty config, it also has many three-handshakings. I am confused of such thing. I find the following source code is invoked when I visited uri "/test" source code: apisix/balancer.lua [https://github.com/apache/apisix/blob/f118f5ea7a5d96023a7bd546545f7c1ad6486495/apisix/balancer.lua#L299](url) ` local idle_timeout = keepalive_pool.idle_timeout local size = keepalive_pool.size local requests = keepalive_pool.requests pool_opt.pool_size = size local ok, err = balancer.set_current_peer(server.host, server.port, pool_opt) if not ok then return ok, err end return balancer.enable_keepalive(idle_timeout, requests) ` the code "balancer.enable_keepalive(idle_timeout, requests)" seems does not work what I do above this is in apisix-dashboard to config keepalive_pool, then I remove keepalive_pool config from my route config, and use config-default.yaml nginx_config.http.upstream.keepalive_timeout is 60s， with the wireshark do examine, it also behaves like above what I discribe. So I want to know, set idle_timeout 0 if could close keepalive, and set idle_timeout is not 0 if could open keepalive_pool ### Environment - APISIX version (run `apisix version`):v2.12 - Operating system (run `uname -a`):linux 3.10.0-957.21.3.el7.x86_64 - OpenResty / Nginx version (run `openresty -V` or `nginx -V`):openresty/1.19.9.1 - etcd version, if relevant (run `curl http://127.0.0.1:9090/v1/server_info`):3.5.0 - APISIX Dashboard version, if relevant: - Plugin runner version, for issues related to plugin runners: - LuaRocks version, for installation issues (run `luarocks --version`): -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
