Graceful Shutdown Orchestration

Snippet

Graceful Shutdown Orchestration

A professional Node.js application must handle termination signals like `SIGTERM`. `server.close()` stops the server from accepting new connections but waits for existing ones to finish. A secondary timeout ensures the process eventually terminates even if some connections are stuck.

snippet.js
javascript
const http = require('http');
const server = http.createServer((req, res) => res.end('OK'));
 
process.on('SIGTERM', () => {
  console.log('SIGTERM received. Closing server...');
  
  server.close(() => {
    console.log('Server closed. Exiting process.');
    process.exit(0);
  });
 
  // Force exit after timeout if connections hang
  setTimeout(() => {
    console.error('Forcing exit after timeout');
    process.exit(1);
  }, 10000);
});

nodejs

Breakdown

server.close(() => { ... })

Wait for all active keep-alive connections to close before exiting.

setTimeout(..., 10000)

Safety hatch to prevent the process from hanging indefinitely.

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Graceful Shutdown Orchestration

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