kellyseeme opened a new issue, #11710: URL: https://github.com/apache/apisix/issues/11710
### Description when Enable upstream health check，The upstream is constantly changing，In the first second it is 1 backend, in the second second it is 100 backends and in the third second it is 110，apisix Will return randomly and occasionally 499 http response code。 if Turn off health checks,then all is ok. when cap the pcap ,no error log found ，apisix No forwarding traffic to the upstream. <img width="1131" alt="image" src="https://github.com/user-attachments/assets/87a13427-6c4a-4480-a9d3-06c4e368f105";> in access log，requst time is near 0,upstream_connect time is 0,upstream_header_time is -,response time is 0,how can i debug this issue？ ### Environment - APISIX version (run `apisix version`):2.3.15 - Operating system (run `uname -a`): - OpenResty / Nginx version (run `openresty -V` or `nginx -V`): - etcd version, if relevant (run `curl http://127.0.0.1:9090/v1/server_info`): - 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]
