Connect two machines in AKKA remotely ,connection refused

Question

I'm new to akka and wanted to connect two PC using akka remotely just to run some code in both as (2 actors). I had tried the example in akka doc. But what I really do is to add the 2 IP addresses into config file I always get this error?

First machine give me this error:

[info] [ERROR] [11/20/2018 13:58:48.833] [ClusterSystem-akka.remote.default-remote-dispatcher-6] [akka.remote.artery.Association(akka://ClusterSystem)] Outbound control stream to [akka://[email protected]:2552] failed. Restarting it. Handshake with [akka://[email protected]:2552] did not complete within 20000 ms (akka.remote.artery.OutboundHandshake$HandshakeTimeoutException: Handshake with [akka://[email protected]:2552] did not complete within 20000 ms)

And second machine:

Exception in thread "main" akka.remote.RemoteTransportException: Failed to bind TCP to [192.168.1.3:2552] due to: Bind failed because of java.net.BindException: Cannot assign requested address: bind

Config file content :

akka {
  actor {
    provider = cluster
  }
  remote {
    artery {
      enabled = on
      transport = tcp
      canonical.hostname = "192.168.1.3"
      canonical.port = 0
    }
  }
  cluster {
    seed-nodes = [
      "akka://[email protected]:2552",
      "akka://[email protected]:2552"]

    # auto downing is NOT safe for production deployments.
    # you may want to use it during development, read more about it in the docs.
    auto-down-unreachable-after = 120s
  }
}

# Enable metrics extension in akka-cluster-metrics.
akka.extensions=["akka.cluster.metrics.ClusterMetricsExtension"]

# Sigar native library extract location during tests.
# Note: use per-jvm-instance folder when running multiple jvm on one host.
akka.cluster.metrics.native-library-extract-folder=${user.dir}/target/native

First of all you need to fix binding problem on the second pc. — Aleksey Isachenkov

Gajendra Naidu Gajendra Naidu · Accepted Answer · 2018-11-20T14:02:39

First of all, you don't need to add cluster configuration for AKKA remoting. Both the PCs or nodes should be enabled remoting with a concrete port instead of "0" that way you know which port to connect.

Have below configurations

PC1

akka {
  actor {
    provider = remote
  }
  remote {
    artery {
      enabled = on
      transport = tcp
      canonical.hostname = "192.168.1.3"
      canonical.port = 19000
    }
  }
}

PC2

akka {
  actor {
    provider = remote
  }
  remote {
    artery {
      enabled = on
      transport = tcp
      canonical.hostname = "192.168.1.4"
      canonical.port = 18000
    }
  }
}

Use below actor path to connect any actor in remote from PC1 to PC2

akka://<PC2-ActorSystem>@192.168.1.4:18000/user/<actor deployed in PC2>

Use below actor path to connect from PC2 to PC1

akka://<PC2-ActorSystem>@192.168.1.3:19000/user/<actor deployed in PC1>

Port numbers and IP address are samples.

Connect two machines in AKKA remotely ,connection refused

1 Answers