How to make Akka.NET's ClusterClient work? - akka.net

Question

I'm trying out ClusterClient as per the docs.
However my client test app keeps getting the following error:
Error while creating actor instance of type Akka.Cluster.Tools.Client.ClusterClient with 1 args: (Akka.Cluster.Tools.Client.ClusterClientSettings)
Cause: [akka://TestSystem/user/$a#705838478]: Akka.Actor.ActorInitializationException: Exception during creation ---> System.TypeLoadException: Error while creating actor instance of type Akka.Cluster.Tools.Client.ClusterClient with 1 args: (Akka.Cluster.Tools.Client.ClusterClientSettings) ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentException: failure-detector.heartbeat-interval must be > 0s
at Akka.Remote.DeadlineFailureDetector..ctor(TimeSpan acceptableHeartbeatPause, TimeSpan heartbeatInterval, Clock clock)
at Akka.Remote.DeadlineFailureDetector..ctor(TimeSpan acceptableHeartbeatPause, Clock clock)
at Akka.Cluster.Tools.Client.ClusterClient..ctor(ClusterClientSettings settings)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, Object[] args)
at Akka.Actor.Props.ActivatorProducer.Produce()
at Akka.Actor.Props.NewActor()
--- End of inner exception stack trace ---
at Akka.Actor.Props.NewActor()
at Akka.Actor.ActorCell.CreateNewActorInstance()
at Akka.Actor.ActorCell.<>c__DisplayClass118_0.<NewActor>b__0()
at Akka.Actor.ActorCell.UseThreadContext(Action action)
at Akka.Actor.ActorCell.NewActor()
at Akka.Actor.ActorCell.Create(Exception failure)
--- End of inner exception stack trace ---
at Akka.Actor.ActorCell.Create(Exception failure)
at Akka.Actor.ActorCell.SysMsgInvokeAll(EarliestFirstSystemMessageList messages, Int32 currentState)
The minimal code I'm using to get this error:
using (var system = ActorSystem.Create("TestSystem")) {
system.Settings.InjectTopLevelFallback(ClusterClientReceptionist.DefaultConfig());
var settings = ClusterClientSettings.Create(system);
var client = system.ActorOf(ClusterClient.Props(settings));
Console.Write("Press any key to exit...");
Console.ReadKey();
}
The HOCON config for the client contains:
akka {
actor {
provider = "Akka.Remote.RemoteActorRefProvider, Akka.Remote"
}
remote {
helios.tcp {
port = 0
hostname = localhost
}
}
cluster {
client {
initial-contacts: ["akka.tcp://TestSystem#localhost:8082/user/receptionist"]
}
}
}
Also checked the settings variable, seemed to be populated and looks ok to me:
Tried several random stuff to actually fulfill the error message:
failure-detector.heartbeat-interval must be > 0s
including various permutation of HOCON entries, but to no avail.
Anything else I missed out?
Update #1
Modified HOCON to initialize Akka.Remote.
Still received what looks like the same error message.
But now it is stating:
failure-detector.heartbeat-interval must be > 0s
Previously it was stating:
failure-detector.acceptable-heartbeat-pause must be >= 0s

Answer 1

Managed to make it working now.
The cause of the issue: I was using Akka.Cluster.Tools latest release version 1.0.6
The fix: Upgraded to the latest beta version 1.1.2.30-beta
p/s: I wished the docs could have specified the minimum NuGet version required to make it work.