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

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
43/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
grpc, python
Domain
authentication

Research direction

Start with the minimal reproduction repository linked in the issue and run its Python cloud function with grpc or firebase_admin.firestore imported. Reproduce the call to the Auth emulator or the GET request to http://127.0.0.1:9099/ and trace where ECONNRESET occurs; done means the request completes without the socket hang-up in that setup.

Written by the indexing model from the issue text.

Description

[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))
Dominant language
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