Qunar Tech Salon
Dec 28, 2018 · Backend Development
Troubleshooting Intermittent 502 Errors in a Node Backend Behind Nginx Reverse Proxy
The article details a step‑by‑step investigation of intermittent 502 errors when routing client requests through Nginx to a Node.js service, identifies malformed URL characters triggering Node's clientError event as the root cause, and presents code and configuration fixes to prevent the issue.
502Node.jsclientError
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