SIGINT during in-flight request causes abrupt termination in Elysia (pending handlers are aborted)

[el-tumakov]

What version of Elysia is running?

1.3.1

What platform is your computer?

Darwin 24.4.0 arm64 arm

What steps can reproduce the bug?

1. Create a file index.js with the following content:

import { sleep } from 'bun';
import { Elysia } from 'elysia';

const app = new Elysia()
  .get('/', async () => {
    await sleep(5000);
    return 'Hello World';
  })
  .listen(3000);

console.log('Server is running');

process.on('SIGINT', () => {
  console.log('Received SIGINT. Stopping server...');
  app.stop().then(() => {
    console.log('Server stopped');
    process.exit(0);
  });
});

2. Run the server.
3. In another terminal or browser, issue a request to the server:

curl http://localhost:3000

4. Immediately press Ctrl+C in the server’s terminal to send SIGINT.

What is the expected behavior?

• On SIGINT, app.stop() should wait for any in-flight handlers (e.g. the 5s sleep) to resolve.
• After the handler completes, the server should send the response ("Hello World") and then shut down gracefully.

What do you see instead?

• The server logs Received SIGINT. Stopping server…
• Process exits instantly.
• The pending request is aborted; the client never receives "Hello World".

Additional information

This Bun example correctly waits for the 5s delay before sending the response, then exits.

const server = Bun.serve({
  port: 3000,
  async fetch() {
    await sleep(5000);
    return new Response('Hello World');
  },
});

console.log('Server is running');

process.on('SIGINT', () => {
  console.log('Received SIGINT. Stopping server...');
  server.stop().then(() => {
    console.log('Server stopped');
    process.exit(0);
  });
});

Have you try removing the node_modules and bun.lockb and try again yet?

Yes

[kravetsone]

Why stop isn't awaited

[el-tumakov]

Actually, I’m calling process.exit(0) inside the .then() callback of app.stop(), so it will only run after the shutdown promise has resolved.

[LeTamanoir]

this PR should fix it #1455