When all the emulators are runnning you can't connect to the functions shell.

You'll get an error:

Error: Port 5000 is not open on localhost, could not start functions emulator.

Repro:

• npm install
• npm start
• npm run shell

Seems this is a bug with hosting emulator cause it does not happen when you do this:

• firebase emulators:start --only database,ui,functions,pubsub
• firebase functions:shell