Fix Nginx Upstream Connection Refused Socket Error
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Nginx 13 Permission Denied Error: Step-by-Step
You're configuring Nginx and see 13: Permission denied in the error log. This us...
How to Fix Node Version Mismatch in a Project
You cloned a project, ran npm install, and got errors about engine incompatibility. ...
Docker Container Exits Immediately: Fix with Restart Policy
You start a Docker container, it runs for a second, then stops. No error messages, just a quick e...
Fix DNS Probe Finished NXDOMAIN in Edge Browser
When Microsoft Edge shows "DNS_PROBE_FINISHED_NXDOMAIN", it means the browser cannot reso...
Handling Missing Peer Dependencies in pnpm Install
When you run pnpm install and see warnings about missing peer dependencies, your pro...
Topic paths
Quick titles
How to Fix Pip Externally Managed Environment ErrorVSCode Git SSH Key Error TroubleshootingMac DNS_PROBE_FINISHED_NXDOMAIN Troubleshooting GuideFixing spawn ENOENT in VSCode Integrated TerminalTroubleshooting Nginx Upstream RefusedHow to Resolve Nginx Configuration Test File Not Found ErrorRebuild Windows Search Index Without Losing DataHow to Rebuild Windows Search Index Safely