Typed actor references from Receptionist

Akka Libraries
, ,
1

I’m using akka 2.5.21, in Java.

After registering the actors (and also spawning them) to a Receptionist I tried to look them up in another class with Receptionist.Find message.

For this I created a temp actor with Receptionist.Listing behavior and invoked Receptionist.Find message, like this context.getSystem().receptionist().tell(Receptionist.find(myLookupServiceKey, this));

But the on the Receptionist.Listing response from Receptionist when I do .getServiceInstances(myLookupServiceKey) I get an empty set.

This seems like a simple way to find references to typed actor previously spawned elsewhere in the system, but looks a dead end :pensive:.

Appreciate any help.

1 Like
2

The system is run in single node. But there are two actor systems, typed (used to spawn actors) and classic (used to start a HTTP server). The discovery was attempted in the REST controller class (not sure if that matters).

3

First, update to latest Akka version. That is 2.6.10 or 2.5.32

4

Thanks for your reply. In my application I’m bound by Scala 2.11, because this application also uses Spark which is on 2.3 in my Spark cluster. I couldn’t use latest Akka and Spark 2.3 clients as different Scala versions are not supported in same JVM.

As much as I want to upgrade the 2.5.21 is the highest version with Scala 2.11 for Akka typed.

5

You can compare with the test from that version: https://github.com/akka/akka/blob/v2.5.21/akka-actor-typed-tests/src/test/scala/akka/actor/typed/internal/receptionist/LocalReceptionistSpec.scala

6

Thanks again Patrik. Hopefully these test resources (I see the Java ones as well) should help.