No connection established with Cloud Functions and Firestore

Question

I'm having issues with connecting to my firestore DB from a cloud function.

I get the below error:

i  functions: Beginning execution of "test"
>  Error: 14 UNAVAILABLE: No connection established
>      at Object.callErrorFromStatus (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/call.js:30:26)
>      at Object.onReceiveStatus (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/client.js:174:52)
>      at Object.onReceiveStatus (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/client-interceptors.js:340:141)
>      at Object.onReceiveStatus (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/client-interceptors.js:303:181)
>      at Http2CallStream.outputStatus (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/call-stream.js:114:27)
>      at Http2CallStream.maybeOutputStatus (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/call-stream.js:153:22)
>      at Http2CallStream.endCall (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/call-stream.js:140:18)
>      at Http2CallStream.cancelWithStatus (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/call-stream.js:430:14)
>      at ChannelImplementation.tryPick (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/channel.js:214:32)
>      at Object.updateState (/Users/michael/project/functions/node_modules/@grpc/grpc-js/build/src/channel.js:82:26) {
>    code: 14,
>    details: 'No connection established',
>    metadata: Metadata { internalRepr: Map {}, options: {} }
>  }

The service account credentials are pointed to by the GOOGLE_APPLICATION_CREDENTIALS environment variable.

This is my functions code:

const functions = require("firebase-functions");
const admin = require("firebase-admin");

admin.initializeApp();
let db = admin.firestore();

exports.test = functions.https.onRequest((req, res) => {

      db.collection("users").doc("test").set({
          'name': 'Michael'
      }).then(ref => {
          res.send(ref.id);
      })
      .catch(err => {
        console.error(err)  
        res.status(500).send(err);
      })

});

... and these are my dependencies in my package.json file

"dependencies": {
    "firebase-admin": "^8.10.0",
    "firebase-functions": "^3.3.0"
  }

I've seen there are more people facing similar issues, they say I should upgrade to the latest version of the firebase-functions and firebase-admin, but in my case they are up to date. Ive also deleted node_modules/ and re-installed it again but the issue persists.

Any thoughts?

Answer 1

Have you ever set an environment variable called FIRESTORE_EMULATOR_HOST?

If that environment variable is set, the firebase admin SDK will try to connect to the emulator instead of the firestore, and if you haven't started the emulator, the Error: 14 UNAVAILABLE: No connection established will occur. https://firebase.google.com/docs/emulator-suite/connect_firestore?hl=en