Running node-cluster preset build throwing EADDRINUSE errors

[aisteneciunaitevalantic]

Environment

Node Version: v18.20.3
Nitro Version: 2.10.4

Reproduction

https://stackblitz.com/edit/github-mrhh35?file=nitro.config.ts

> npm run build
> npm run preview

Describe the bug

Running application with preset 'node-cluster' is throwing EADDRINUSE errors

Additional context

No such issue in v2.9.7

Logs

[nitro] [uncaughtException] Error: bind EADDRINUSE null:3000
    at __node_internal_captureLargerStackTrace2 (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/builtins.ddb8d84d.js:101:5335)
    at __node_internal_exceptionWithHostPort2 (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/builtins.ddb8d84d.js:101:7017)
    at listenOnPrimaryHandle (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/builtins.ddb8d84d.js:285:12098)
    at rr (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/builtins.ddb8d84d.js:55:2291)
    at Worker.<anonymous> (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/builtins.ddb8d84d.js:55:2716)
    at _0x54dcec.onInternalMessage (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/builtins.ddb8d84d.js:59:458)
    at _0x54dcec.emit (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/builtins.ddb8d84d.js:30:11015)
    at emit (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/builtins.ddb8d84d.js:52:6956)
    at processTicksAndRejections (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/builtins.ddb8d84d.js:192:1093)
    at https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/blitz.d3acb9e1.js:40:198427
    at _0x40724c (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/blitz.d3acb9e1.js:40:198508)
    at _0x323f12 (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/blitz.d3acb9e1.js:40:508059)
    at https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/blitz.d3acb9e1.js:40:508836
    at Array.forEach (<anonymous>)
    at _0x325fd3 (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/blitz.d3acb9e1.js:40:508824)
    at Map.forEach (<anonymous>)
    at _0x26b4f2 (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/blitz.d3acb9e1.js:40:508453)
    at _0x2934c6 (https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/blitz.d3acb9e1.js:40:507451)
    at https://qgnirvpgrqgithub-iuqv.w-credentialless-staticblitz.com/blitz.d3acb9e1.js:40:507618 {
  errno: -48,
  code: 'EADDRINUSE',
  syscall: 'bind',
  address: null,
  port: 3000
}

[OskarLebuda]

Probably, the problem lies here:
https://github.com/nitrojs/nitro/blob/v2/src/presets/node/runtime/node-server.ts#L32

The code with server should be exported as a main (or similarly named) function.
After a simple change to node-server.ts:

export const main = async () => {
  // all code here
};

Then, node-cluster.ts should update the import in the runWorker function:

function runWorker() {
  import("./node-server")
    .then((server) => {
      server.main();
    })
    .catch((error) => {
      console.error(error);
      process.exit(1);
    });
}

Result:

I've created a PR for this fix: #2893

[pi0]

Thanks for the report. this issue should be fixed in the nightly channel.

[Zae]

Any idea when we can expect this fix in nuxt stable? Right now node_cluster mode is totally broken in nuxt > 3.13

[pi0]

You can pin nitropack only to latest nightly build with Nuxt.

[Zae]

Hi @pi0 , using the nightly build is not really a fix for us in production, is there a way to get this fix into stable?