Error: TIMEOUT: Port 8080 on localhost was not active within 30000ms

firebase-debug.log Cloud Firestore emulator quickstart I am getting the Timeout error running the emulators:exec command on an unchanged project.

I tried other ports 8081, 8082 and

$ sudo firebase emulators:exec --only firestore 'npm test'
$ firebase emulators:exec 'npm test'
$ firebase emulators:start

produced the same Timeout error.

./firebase/quickstart-nodejs/firestore-emulator/javascript-quickstart

macOS v 10.15.6

$ firebase --version
8.4.2
$ node --version
v14.4.0
$ 

$ firebase emulators:exec --only firestore 'npm test'
i  emulators: Starting emulators: firestore
i  firestore: Firestore Emulator logging to firestore-debug.log
i  emulators: Shutting down emulators.

Error: TIMEOUT: Port 8080 on localhost was not active within 30000ms

[evelant]

I got the emulators running again by specifying host as “127.0.0.1” instead of the default “localhost”. I have no idea what changed that caused it to stop working on localhost. All I did was modify firebase.json like so to add host

 "emulators": {
        "auth": {
            "port": 9099,
            "host": "127.0.0.1"
        },
        "functions": {
            "port": 5001,
            "host": "127.0.0.1"
        },
        "firestore": {
            "port": 8080,
            "host": "127.0.0.1"
        },
        "hosting": {
            "port": 5001
        },
        "ui": {
            "enabled": true
        },
        "pubsub": {
            "port": 8085,
            "host": "127.0.0.1"
        },
        "storage": {
            "port": 9199,
            "host": "127.0.0.1"
        }
    }

[clouddevil]

As @stansotn mentioned, downgrade to 16 node work for me too. Catalina (10.15.7), tools - 9.22.0

brew unlink node
brew install node@16
brew link --overwrite node@16