Firebase Auth - successful signInWithEmailAndPassword hangs, only errors returned

[meavydev]

I have actually raised this as an issue in the Java SDK, as I am using Kobweb with the API running under a JVM, so it actually calls through to the Java SDK.

I am raising this issue for reference to help others who might have the same problem.

Internally in the Java SDK it is doing an enqueueRefreshTokenCall which on success tries to set the user via:

                            this@FirebaseAuth.user = user
                            source.setResult(user)

However the setting of the FirebaseAuth.user line is just hanging under Kobweb.

[meavydev]

Actually I just realised there is code behind the assignment and the problem is that it uses:

                GlobalScope.launch(Dispatchers.Main) {

Which is obviously a bad thing to do, as GlobalScope is one of the things that they say never to use...

[meavydev]

Actually as a quick hack I have taken a local copy of firebase-java-sdk and removed all the Dispatchers.Main in FirebaseAuth.kt and this has got me further.
So it is being caused by the Java SDK using Dispatchers.Main which is not cross platform friendly with limited JVM support.
Well apart from GlobalScope.launch not being a good practice of course ;)