I am following the example/tutorial at http://getakka.net/articles/clustering/cluster-client.html#an-example, which recommends adding the line:

akka.extensions = ["Akka.Cluster.Tools.Client.ClusterClientReceptionist"]

to your HOCON. However, after doing this, I see errors during startup:

[ERROR][18/08/2017 08:43:05][Thread 0010][ActorSystem(Repro)] [Akka.Cluster.Tools.Client.ClusterClientReceptionist] is not an 'ExtensionId', skipping...
Cause: Unknown

I've had a look at the code which generates this error:

This seems to take the strings in akka.extensions and look them up as types using Type.GetType. This part fails as there is no assembly name (change the configuration to akka.extensions = ["Akka.Cluster.Tools.Client.ClusterClientReceptionist, Akka.Cluster.Tools"] and it can now find the type).

But then, a subsequent check fails; the type specified needs to implement Akka.Actor.IExtensionId, which Akka.Cluster.Tools.Client.ClusterClientReceptionist does not:

https://github.com/akkadotnet/akka.net/blob/dev/src/contrib/cluster/Akka.Cluster.Tools/Client/ClusterClientReceptionist.cs#L20

Am I doing something wrong?

Thanks.