akkadotnet/akka.net

Port of Akka actors for .NET

Mike Johnson

@softwaremike

Next problem - I upgraded all my projects across the board to 1.1.1. When the actor system starts up, I now get this exception:

Logger [Akka.Event.DefaultLogger] specified in config cannot be loaded:
System.MissingMethodException: Method not found: 'System.Type Akka.Dispatch.Mailboxes.GetMailboxType(Akka.Actor.Props, Akka.Configuration.Config)'.
at Akka.Remote.RemoteActorRefProvider.ActorOf(ActorSystemImpl system, Props props, IInternalActorRef supervisor, ActorPath path, Boolean systemService, Deploy deploy, Boolean lookupDeploy, Boolean async)
at Akka.Actor.ActorCell.MakeChild(Props props, String name, Boolean async, Boolean systemService)
at Akka.Actor.ActorCell.AttachChild(Props props, Boolean isSystemService, String name)
at Akka.Actor.Internal.ActorSystemImpl.SystemActorOf(Props props, String name)
at Akka.Event.LoggingBus.AddLogger(ActorSystemImpl system, Type loggerType, LogLevel logLevel, String loggingBusName, TimeSpan timeout)
at Akka.Event.LoggingBus.StartDefaultLoggers(ActorSystemImpl system)

My HOCON config is very simple:

akka {
actor {
provider = "Akka.Remote.RemoteActorRefProvider, Akka.Remote"
}

remote {
    helios.tcp {
        port = 8092
        hostname = localhost
    }
}

}

Anyone seen this exception before?

Mike Johnson

@softwaremike

Never mind, ignore that... one of my projects still had Akka.Remote 1.0.8 it its references :) oops!

riawz

@riawz

I have an actor which itself loops, like GetMsg, ProcessMsg, if GetMsg is not null, then pass to ProcessMsg, otherwise, wait for a few seconds then tell itself to GetMsg again

what's the best way to test this kind of workflow?

GetMsg and ProcessMsg are two separate actors, which ProcessMsg is created by GetMsg

Peter Hvidgaard

@hvidgaard

Anyone have experience with SimpleInjector and Akka.net together? I'm getting "Do not create actors using 'new', always create them using an ActorContext/System" when the container is verified.

I initialize like this

container.Register<QueryDataStoreActorBase, QuerySqlDataStore>();
var system = ActorSystem.Create("ActorSystem");
system.AddDependencyResolver(new SimpleInjectorDependencyResolver(container, system));
container.RegisterSingleton(system);

riawz

@riawz

is there a way to ExpectMsg<MsgType>() multiple times?

Arjen Smits

@Danthar

@hvidgaard system.AddDependencyResolver(new SimpleInjectorDependencyResolver(container, system)); is wrong

See https://github.com/akkadotnet/Akka.DI.SimpleInjector

Just calling var resolver = new SimpleInjectorDependencyResolver(container, system); is enough

it registers itself with the system

the system.AddDepedencyResolver is a public api exposed for the DI plugins to use. It should not be used directly. Although it is possible, if you know what you are doing.

Peter Hvidgaard

@hvidgaard

@Danthar Alright, removed that line, but the example still fails because SI creates all registered dependencies during verification.

Arjen Smits

@Danthar

@riawz ExpectMsgAllOf ??

Oh? thats odd.

riawz

@riawz

actually, I don't need it, I have actor A which creates actor B, B is roundrobin, but when I'm testing, I can only test against a single instance of actor B, so I don't need it, thanks

A will receive 2 response from 2 B instances, that's what I was thinking of testing but I can't find a way to "mock" router using testkit

Arjen Smits

@Danthar

@hvidgaard it looks like the SimpleInjector plugin is still on 1.0.8 ?

The tests work. So plugin integration for 1.0.8 looks good

Peter Hvidgaard

@hvidgaard

I've updated to the latest akka.net packages, I assumed that a minor version increase wasn't a problem.

Arjen Smits

@Danthar

Have you ran the tests ?

Peter Hvidgaard

@hvidgaard

no, I've used the NuGet packages.

Arjen Smits

@Danthar

That would be a problem :P

If you upgrade, you should rebuild the plugin against the latest akka.net packages

Peter Hvidgaard

@hvidgaard

okay, good to know...

Arjen Smits

@Danthar

I just forked the repo and got the env open just now. ill check for you

It looks ok.

I gtg, got a meeting

Peter Hvidgaard

@hvidgaard

alright, playing with it myself. Thanks so far

Arjen Smits

@Danthar

but if you update the repo to have the plugin use the latest akka.net. And build a version explicitly targetting it, that should work

also check the tests project of the plugin, for details on how to register dependencies

could be the readme is wrong

gl!

Peter Hvidgaard

@hvidgaard

ok, I'll try that.

Peter Hvidgaard

@hvidgaard

@Danthar I figured out what was wrong. I had an Actor that was a base for my other Actors that query a datastore. When creating a class it automatically creates the base class as well, leading to the issue. Nothing to do with SImple Injector.

Arjen Smits

@Danthar

ah, good to hear you figured it out. :+1:

Julien Adam

@julienadam

Hey guys, I have a cluster running with 6 nodes including 2 seeds (A and B), all started at the same time. According to the logs, the leader is trying to move seed node B to [Up] every 3 or 4 seconds. Node B appears as "Joining" to my monitoring node but never goes to the Up status. No dead letters, no exceptions. I've restarted the whole cluster twice but the situation persists. Any ideas ?

Bartosz Sypytkowski

@Horusiath

@julienadam does seeds know about each other? what if you'll introduce a little delay between starting them?

Julien Adam

@julienadam

all the nodes have both seeds set in the akka.cluster.seed-nodes config property. I'll try with a delay

interesting, it's always the last node I start that the leader is trying to move to Up but remains 'Joining' to the other nodes

Max

@maxpaj

Anyone got experience with Akka.Persistence with Redis storage connector? I can't get it to work and I'm getting no errors... It's weird.

Bartosz Sypytkowski

@Horusiath

@maxpaj how are you configuring it?

Max

@maxpaj

          persistence {
              journal {
                redis {
                  # qualified type name of the Redis persistence journal actor
                  class = "Akka.Persistence.Redis.Journal.RedisJournal, Akka.Persistence.Redis"

                  # connection string, as described here: https://github.com/StackExchange/StackExchange.Redis/blob/master/Docs/Configuration.md#basic-configuration-strings
                  configuration-string = "localhost:6380,ssl=false"

                  # dispatcher used to drive journal actor
                  plugin-dispatcher = "akka.actor.default-dispatcher"

                  #Redis journals key prefixes. Leave it for default or change it to appropriate value. WARNING: don't change it on production instances.
                  key-prefix = "akka:persistence:journal"
                }
              }

              snapshot-store {
                redis {
                  # qualified type name of the Redis persistence snapshot storage actor
                  class = "Akka.Persistence.Redis.Snapshot.RedisSnapshotStore, Akka.Persistence.Redis"

                  # connection string, as described here: https://github.com/StackExchange/StackExchange.Redis/blob/master/Docs/Configuration.md#basic-configuration-strings
                  configuration-string = "localhost:6380,ssl=false"

                  # dispatcher used to drive snapshot storage actor
                  plugin-dispatcher = "akka.actor.default-dispatcher"

                  #Redis storage key prefixes. Leave it for default or change it to appropriate value. WARNING: don't change it on production instances.
                  key-prefix = "akka:persistence:snapshots"
                }
              }
            }

Bartosz Sypytkowski

@Horusiath

it looks like you're not setting the plugin

if you want to use it as default

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