Graceful Shutdown in Node.js: Stop Losing Requests During Deploys

Graceful Shutdown in Node.js: Stop Losing Requests During Deploys Your deploy kills in-flight requests. Users get 502s. Database transactions hang open. The Problem SIGTERM arrives. process.exit() runs. Active connections drop. Users see errors. The Fix import http from "http"; import { Pool } from "pg"; const pool = new Pool(); const app = express(); const server = http.createServer(app); let isShuttingDown = false; app.use((req, res, next) => { if (isShuttingDown) return res.status(503).json({ error: "Shutting down" }); next(); }); async function shutdown(signal: string) { console.log(`Received ${signal}. Starting graceful shutdown...`); isShuttingDown = true; server.close(() => console.log("HTTP server closed")); await pool.end(); process.exit(0); } process.on("SIGTERM", () => shutdown("SIGTERM")); process.on("SIGINT", () => shutdown("SIGINT")); setTimeout(() => { console.error("Forced shutdown"); process.exit(1); }, 30000); The Shutdown Order Stop accepting new conne