RetryAgent doesn't keep the event loop alive

[blinsay]

Bug Description

When using RetryAgent, Node exits while there are pending retries in flight.

Reproducible By

I've been playing around in a brand new node project with only unidici installed and trying to run the following script. This is mostly copy/pasted from the docs - I don't think I'm doing anything unorthodox here.

import { request, Agent, RetryAgent } from "undici";

const resp = await request("http://httpbin.org/status/418", {
  dispatcher: new RetryAgent(new Agent(), {
    statusCodes: [418],
  }),
  headers: { "User-Agent": "teapot" },
});

console.log("status:", resp.statusCode);
console.log("headers:", resp.headers);

Expected Behavior

I'd expect to get either an HTTP response or a retry error.

Logs & Screenshots

$ node example.js; echo "exit code: $status"
Warning: Detected unsettled top-level await at file:///[redacted]/example.js:3
const resp = await request("http://httpbin.org/status/418", {
             ^



exit code: 13

Additional context

$ node --version
v23.5.0
$ grep undici package.json
    "undici": "^7.2.0"

[mcollina]

Thanks for reporting! Would you like to send a Pull Request to address this issue? Remember to add unit tests.

[blinsay]

Thanks for reporting! Would you like to send a Pull Request to address this issue? Remember to add unit tests.

It's not obvious to me what's wrong, or I would have sent one already! From skimming the RetryAgent code I can't tell why Node would decide the task queue is empty.