Firestore/Firebase Emulator Not Running

Question

I'm trying to test my functions locally using the guide listed here https://firebase.google.com/docs/functions/local-emulator

I have installed the latest firebase-tools using

npm install -g firebase-tools

In my package.json I confirmed to be running

"firebase-admin": "^7.3.0",
"firebase-functions": "^2.3.1",

When I try to run my functions using

firebase emulators:start

It gives me the below output. What am I doing wrong?

Starting emulators: ["functions"]
⚠  Your requested "node" version "8" doesn't match your global version "11"
✔  functions: Emulator started at http://localhost:5001
i  functions: Watching "[FUNCTIONS FOLDER PATH]" for Cloud Functions...
⚠  Default "firebase-admin" instance created!
⚠  Ignoring trigger "[FUNCTION NAME]" because the service "firebaseauth.googleapis.com" is not yet supported.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.

etc.
etc.
etc.
i  functions: HTTP trigger initialized at http://localhost:5001/[APP NAME]/us-central1/[FUNCTION NAME]

[2019-05-15T21:43:52.436Z]  @firebase/database: FIREBASE WARNING:  
{"code":"app/invalid-credential","message":"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  
metadata.google.internal:80. Error code: ENOTFOUND\"."} 

Answer 1

I had the same issue there were a few things wrong for me

1. ensure the emulator is installed by running firebase setup:emulators:firestore

My second issue was that my initial firebase configuration had installed the config files into my home folder rather then the project folder as described [here] this meant so my project was missing firestore.rules and firestore.indexes.json and some of the configuration settings.

run firebase init to generate these files

Once I fixed these two things it worked for me. I hope this helps.

As a reference my firebase.json looks like this

{
  "functions": {
    "predeploy": [
      "npm --prefix \"$RESOURCE_DIR\" run lint",
      "npm --prefix \"$RESOURCE_DIR\" run build"
    ]
  },
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "hosting": {
    "public": "dist",
    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ]
  },
  "emulators": {
    "firestore": {
      "port": "5002"
    }
  }
}

Answer 2

If checking Firebase setup doesn't work, try this:

• Run firebase emulators:start. Check if displayed error request to install OpenJDK.
• If your functions interacts with Firebase APIs or Google APIs, you need to setup admin credentials. Check how to do it here: https://firebase.google.com/docs/functions/local-emulator
• You may need to emulate functions and firestore at the same time. Use firebase emulators:start --only functions,firestore or firebase serve --only functions,firestore.
• Keep in mind that pubsub is not suported yet. As Sam Stern comments, pub sub is now supported.