ECONNRESET connecting to Firebase auth emulator from functions emulator with grpc imported

[danielparks]

[READ] Step 1: Are you in the right place?

I’m not sure that the root cause of this issue is, but this repo seems like the most likely culprit. Other possibilities: gRPC, firebase-tools, firebase-functions.

[REQUIRED] Step 2: Describe your environment

• Operating System version: macOS 15.7.4 (24G517)
• Firebase SDK version: 7.4.0
• Firebase Product: auth
• Python version: 3.11.15
• Pip version: uv 0.11.6

[REQUIRED] Step 3: Describe the problem

Steps to reproduce:

danielparks/firebase-emulator-auth-hang-up is minimal test repo with more exhaustive details including a workaround.

Within a Python cloud function that has grpc or firebase_admin.firestore imported, call an auth method, e.g. auth.create_user(...), or make a GET request to the auth endpoint, e.g. requests.get("http://127.0.0.1:9099/", timeout=1).

The function will fail with ECONNRESET (“Error: socket hang up”).

Relevant Code:

Simplified example (see the repo above for a functional example):

from firebase_admin import initialize_app
from firebase_functions import https_fn
import requests

import grpc
# or, import firebase_admin.firestore

initialize_app()

@https_fn.on_call()
def connect(req):
    # Make a simple GET request to the auth emulator endpoint:
    return repr(requests.get("http://127.0.0.1:9099/", timeout=1))