Ports

Node

Fix “Error: listen EADDRINUSE: address already in use” in Node.js

The error “EADDRINUSE: address already in use” means another process is already listening on the port your Node.js server wants, usually an older copy of your own app. Find it with lsof -i :3000 (macOS and Linux) or netstat -ano | findstr :3000 (Windows), stop it, or start your server on a different port. Then add graceful shutdown so the port is released every time.

Published November 12, 20268 min read