检查 nginx 502 错误

“Agent correctly diagnosed the 502 error by checking logs, identified upstream timeout and php-fpm saturation, explained why backup pool wasn't triggered, and proposed actionable fixes.”

“Agent correctly diagnosed the upstream timeout issue, understood the user's intent to fix it, executed efficient configuration changes, coordinated the tools well, and delivered a clear response with measurable improvement.”

“The assistant correctly identified the root cause (backup pool not triggering), proposed effective solutions, executed the changes, and reported measurable improvement.”

“The assistant correctly understood the user's request to modify and reload, executed the changes, and reported the successful outcome with clear metrics.”