akkadotnet/akka.net

Port of Akka actors for .NET

John Nicholas

@MrTortoise

oh cool thats what i want ;) thanks ill keep an eye on that then, thats cleaner than what i'm doing

Hussein Ait-Lahcen

@hussein-aitlahcen

@Horusiath Thanks, the fork join dispatcher seems to fit

Diego Frata

@diegofrata

I'm creating a ReceivePersistentActor using Context.DI().Props<T>() and I'm getting this exception:
```
Exception thrown: 'System.NotSupportedException' in Akka.dll

Additional information: DequeBasedMailbox required, got: UnboundedMailbox

An (unbounded) deque-based mailbox can be configured as follows:

my-custom-mailbox {

    mailbox-type = "Akka.Dispatch.UnboundedDequeBasedMailbox"

}

I shouldn't need to specify my own Mailbox type, right? It seems like a bug to me.

Diego Frata

@diegofrata

My actors implement a common interface and I was using the interface as T instead of the concrete type. It was messing the ActorCell creation. I wouldn't say this is a bug, but it's definitely a point for improvement IMHO. In the meantime I'm passing concrete types.

Thomas Tomanek

@thomastomanek

hmm, there was a bug ages ago that returned a similar/same exception when using autofac to create actors

#941

Christian Duhard

@cduhard

any plans to update the docs here soon? http://getakka.net/docs/Fault%20tolerance#supervision-of-top-level-actors

Christian Duhard

@cduhard

what might these messages mean?

[Debug] Resolve of path sequence [/"user/contact-pool-e4338572-5484-4e67-94d5-59e7289d207e/$b"] failed

Aaron Stannard

@Aaronontheweb

@cduhard what were you trying to do?

Christian Duhard

@cduhard

not sure when that log message is getting fired, but I have a small RR pool per Parent that gets handed to it's children

Aaron Stannard

@Aaronontheweb

that message occurs when an actor selection fails

the requested path could not be found

Christian Duhard

@cduhard

                Context.System.ActorOf(
                    Akka.Actor.Props.Create<ContactVerificationActor>(ContactService.GetInstance(),
                        new SequenceService())
                        .WithRouter(new RoundRobinPool(2))
                    , "contact-pool-{0}".FormatWith(Guid.NewGuid()));

why would selection fail? i have never seen that message before today

Aaron Stannard

@Aaronontheweb

my bad - here's where it gets called

private IActorRef ResolveActorRef(IInternalActorRef actorRef, IReadOnlyCollection<string> pathElements)
        {
            if(pathElements.Count == 0)
            {
                _log.Debug("Resolve of empty path sequence fails (per definition)");
                return _deadLetters;
            }
            var child = actorRef.GetChild(pathElements);
            if(child.IsNobody())
            {
                _log.Debug("Resolve of path sequence [/{0}] failed", ActorPath.FormatPathElements(pathElements));
                return new EmptyLocalActorRef(_system.Provider, actorRef.Path / pathElements, _eventStream);
            }
            return child;
        }

Inside LocalActorRefProvider

Christian Duhard

@cduhard

the messages eventually stop and everything seems to move along fine

Aaron Stannard

@Aaronontheweb

without seeing what's actually happening, i.e. the larger context

difficult to tell

never seen that error get logged before

Context.System.ActorOf is weird though - you're not creating a child when you do that

you're creating another top-level actor

not sure if that's intentional or not

Christian Duhard

@cduhard

shit, no it's not

hah, thanks for noticing that, dunno if it's related to my issue

Aaron Stannard

@Aaronontheweb

yeah me neither

could you post a bigger gist?

Christian Duhard

@cduhard

the weird thing is i have another pool created the exact same way that doesn't throw those errors

Christian Duhard

@cduhard

the only thing i've changed is i went from a ReceiveActor to ActorBase, it's likely something i missed there

Christian Duhard

@cduhard

i don't know what i'd put in the gist, what would help?

is there a problem with using PatternMatch in Receive?

Bartosz Sypytkowski

@Horusiath

@rogeralsing I've pushed #1408 for initial Akka.Cluster.Tools, but when working on example program, I've found two serialization issuess: 1) is concerning JSON.NET not being able to deserialize IDictionary<Address, ...> (if get serialized as map of string keys) and 2) is about Wire having problems with finding default constructor for System.Collections.Immutable.ImmutableDictionary

any of them is effectively blocking distributed pub/sub (and cluster client) examples to work

Christian Duhard

@cduhard

I am getting all these:
[Debug] Resolve of path sequence [/"user/contact-pool-e4338572-5484-4e67-94d5-59e7289d207e/$b"] failed
before the router even receives any messages.

Aaron Stannard

@Aaronontheweb

hmmm... mind creating an issue for that @cduhard ?

I wonder if there's something racy with the way routers create children

might be totally harmless

but we should investigate

Christian Duhard

@cduhard

could it have anything to do with monitoring?

Aaron Stannard

@Aaronontheweb

using Akka.Monitoring?

Christian Duhard

@cduhard

yes

Aaron Stannard

@Aaronontheweb

hmmm.... could be - calling it from the child actor/

Christian Duhard

@cduhard

yes

Aaron Stannard

@Aaronontheweb

only way I could see that happening would be if the actor was receiving a message while it was still being created... which Akka.Monitoring implementation are you using?

Christian Duhard

@cduhard

statsd

nothing gets to Receive until after i see a zillion of those messages

Aaron Stannard

@Aaronontheweb

could you do a test for me and try commenting the monitoring method calls out

see if those come in?

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