Trying to accept message on a pull socket with akka-zeromq does not work with libzmq 3.2.2 (Arch linux). Downgrading the library to 2.2.0 works. Here is the Scala code:

package main

import akka.actor._
import akka.zeromq._

class ZmqActor extends Actor {
  def receive = {
    case x => println("M: " + x.toString)
  }
}

object Main extends App {
  val system = ActorSystem("system")

  val listener = system.actorOf(Props[ZmqActor], "zmq-actor")

//  val subSocket = ZeroMQExtension(system).newSocket(SocketType.Sub,
//    Listener(listener), Connect("tcp://127.0.0.1:8008"), SubscribeAll)

  val pullSocket = ZeroMQExtension(system).newSocket(
    SocketType.Pull, Listener(listener), Connect("tcp://127.0.0.1:8008"))

  println("Press ENTER to exit")
  Console.readLine()
  system.shutdown()
}

Here it the python script that does the sending:

import zmq

ctx = zmq.Context()
sock = ctx.socket(zmq.PUSH)
sock.bind("tcp://*:8008")
sock.send("test")

In the case of version 3, the only output is Connecting and nothing else happens. In the case of 2.2 - it works as expected. Also, when using v3 and pressing enter (pass the readLine() line) the app does not exit. I should send it a message, which doesn't get printed, but the app exists gracefully.