Authentication error in tasks firebase emulator on enqueue

[jootten]

Environment

• Operating System version: Fedora Linux 40
• Firebase SDK version: 6.0.1
• Firebase Product: auth, tasks, emulator
• Node.js version: 18
• NPM version: 10.2.3
• Firebase Tools: 13.23.1

Problem

Authentication fails in the firebase tasks emulator on

await queue.enqueue(...)  \\ full sample below

with the following error:
Error scheduling task FirebaseAppError: Credential implementation provided to initializeApp() via the "credential" property failed to fetch a valid Google OAuth2 access token with the following error: "Error fetching access token: Error while making request: getaddrinfo ENOTFOUND metadata.google.internal. Error code: ENOTFOUND".

We were able to reproduce the bug reported here firebase/firebase-tools#7821 with the latest SDK and firebase tools versions.

The error does not occur when application default credentials are available and is thus easily overlooked.

Steps to reproduce:

1. Setup firebase project as in Cloud Tasks Emulator Error: Error fetching access token: invalid_grant (reauth related error (invalid_rapt)) firebase-tools#7821.
2. Start the emulator with the code below.

npm run build && npx firebase emulators:start --project='demo-project' --debug

3. Enqueue a task by executing the testOnRequest function (http://127.0.0.1:5001/demo-project/us-central1/testOnRequest).

emulator-debug.log

Relevant Code:

Reproducible example that is even more minimal than in the mentioned issue:

import { onRequest } from "firebase-functions/v2/https";
import { getFunctions } from "firebase-admin/functions";
import { onTaskDispatched } from "firebase-functions/v2/tasks";
import * as logger from "firebase-functions/logger";
import { initializeApp } from "firebase-admin/app";

// Initialize the Firebase app
initializeApp()

// The http function
export const testOnRequest = onRequest(async (request, response) => {
  const taskPayload = {
    foo: "bar",
  };

  const taskFunctionName = `testOnTaskDispatched`;
  const queue = getFunctions().taskQueue(taskFunctionName);

  try {
    await queue.enqueue(taskPayload);
    response.send("Success. Hello from HTTP onRequest!");
  } catch (error) {
    console.error("Error scheduling task", error);
    response.status(500).send("Error scheduling task");
    return;
  }
});

// The task function
export const testOnTaskDispatched = onTaskDispatched( (request) => {
  logger.info("Success. Hello logs from TASKS onTaskDispatched!", {
    foo: request.data,
  });
});