Receive<RetryableQuery> never assigns the return value from IncrementFailures() and your job will never finish.

[arbesoft]

you have to replace line 197 in https://github.com/petabridge/akka-bootcamp/blob/master/src/Unit-3/lesson5/Completed/Actors/GithubCoordinatorActor.cs with

**Receive(query => !query.CanRetry && query.Query is GithubWorkerActor.QueryStarrer, query =>
{
_githubProgressStats = _githubProgressStats.IncrementFailures();

            foreach (var subscriber in _subscribers)
            {
                subscriber.Tell(_githubProgressStats);
            }
        });**

because if you get an error for example from git the error I have listed below. The Job never will finish, the expecteduser never will be the same like UsersThusFar + QueryFailures. If you not assign the return value from "IncrementFailures" the QueryFailures always will be ZERO.

{
"documentation_url": "https://developer.github.com/v3/#abuse-rate-limits",
"message": "You have triggered an abuse detection mechanism. Please wait a few minutes before you try again."
}