Event listeners are registered twice about event-emitter

[adelbke]

Update:

I have found why get(EventEmitter) didn't work in my codebase, I had two eventEmitter instances running in my app.
I found the bug and fixed it Now get(EventEmitter) works in my codebase ^^

But the problem persists , the listener is still triggered twice

[micalevisk]

it works when you drop the useless NestFactory.createApplicationContext(AppModule) call. I can't tell for sure if this is expected or a bug regarding sharing the same root module on both repl and NestFactory.create*

side note: please next time make sure that your repro has everything to reproduce the issue. It lacks a npm-script to run the repl file

[adelbke]

You're right. 🤦🏻 removing the useless app creation does fix the issue.
I will make sure to include the npm-script next time.

Could you tell me how this mistake doesn't surface? Two app instances are loaded at once? Why does the debug() not complain or show anything regarding this? I wasn't able to see two AppService instances running.

Thank you

[micalevisk]

@adelbke I'm in the same boat as you. I'd have to investigate deeper to understand how that was possible.

I guess you can create a new issue at the main repo to report this as a repl issue(?) then we will see Kamil's thoughts about it