@robin it compiles, but is it tail call optimized?

There is no recursion in there?

No function is tail call optimized on the JVM (Except for maybe some optimization the runtime does). You can imitate that behavior in recursive functions by using the

tailrec

modifier.

But how to do in with

lateinit var ...

?

I don't think it's possible there. If you really need it you will have to unroll it yourself.

a scatter-and-gather pool of workers, each of which must process a single task at a time and it has capabilities based on it's state (connected/disconnected/failed/paused), it also renews its connection on timely bases or after specific errors.

You can probably use coroutine actors. https://github.com/Kotlin/kotlinx.coroutines/blob/master/docs/shared-mutable-state-and-concurrency.md#actors

I do 🙂