Manual Graceful shutdowns do not work

[higgins]

Link to the code that reproduces this issue

https://github.com/higgins/next13-graceful-shutdown-bug

To Reproduce

1. git clone https://github.com/higgins/next13-graceful-shutdown-bug.git
2. cd next13-graceful-shutdown-bug
3. npm i
4. npm run build
5. npm start
6. Send SIGINT or SIGTERM to the running server and observe no Received SIGINT: cleaning up or Received SIGTERM: cleaning up message logged

Current vs. Expected behavior

Following steps 1-5 in previous section, I expect to see Received SIGINT: cleaning up or Received SIGTERM: cleaning up message logged after sending SIGINT or SIGTERM to the current server.

Verify canary release

• I verified that the issue exists in the latest Next.js canary release

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 22.6.0: Fri Sep 15 13:41:28 PDT 2023; root:xnu-8796.141.3.700.8~1/RELEASE_ARM64_T6020
Binaries:
  Node: 18.17.1
  npm: 9.6.7
  Yarn: N/A
  pnpm: 8.7.5
Relevant Packages:
  next: 13.5.5-canary.13
  eslint-config-next: N/A
  react: 18.2.0
  react-dom: 18.2.0
  typescript: N/A
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

Not sure, App Router

Additional context

We see the expected log message Received SIGINT: cleaning up only at build time
The run-time event handler is not attached.

[yaogang-rg]

We noticed the same issue and found out that Next.js has added SIGTERM and SIGINT handlers in many places, for example:

// node_modules/next/dist/server/lib/router-server.js
 if (!process.env.__NEXT_PRIVATE_CPU_PROFILE) {
      process.exit(0);
  }

// node_modules/next/dist/server/lib/start-server.js
process.on("SIGTERM", ()=>cleanup(0));

Without patching Next.js, the only ugly hack we could get work is this:

// Add to _document.jsx
if (process.env.NEXT_MANUAL_SIG_HANDLE) {
  const originalExit = process.exit;

  process.exit = function (code) {
    console.log(`Exit called with code: ${code}`);
  };

  process.on('SIGTERM', () => {
    console.log('Received SIGTERM. Starting graceful shutdown...');

    // Simulate a graceful shutdown delay
    setTimeout(() => {
      console.log('Graceful shutdown complete.');
      originalExit(0);
    }, 5000);
  });
}

[xiaolongkipsi]

follow, hit the same issue

[github-actions]

This closed issue has been automatically locked because it had no new activity for 2 weeks. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.