Akka nodi di semi di cluster danno errore: far cadere un messaggio per il destinatario non locale

Question

Sto cercando di creare un cluster Akka base su una macchina Win 7 da questa documentazione:
http://doc.akka.io/docs/akka/snapshot/scala/cluster-usage.html

e sto ottenendo un errore quando ho eseguito i nodi di sementi (più su di loro qui di seguito)

AdriansClusterSystem-akka.actor.default-dispa tcher-16] [akka://AdriansClusterSystem/system/endpointManager/reliableEndpointWr iter-akka.tcp%3A%2F%2FAdriansClusterSystem%40127.0.0.1%3A2552-3/endpointWriter] dropping message [class akka.actor.SelectChildName] for non-local recipient [Act or[akka.tcp://ClusterSystem@127.0.0.1:2552/]] arriving at [akka.tcp://ClusterSys tem@127.0.0.1:2552] inbound addresses are [akka.tcp://AdriansClusterSystem@127.0 .0.1:2552]

domanda: Perche 'si ottengono questo errore? Mi sono perso qualcosa dalla documentazione di akka?

Il mio file .conf:
ho aggiunto questa linea * in più per il file presente all'indirizzo di cui sopra * enabled-transports = ["akka.remote.netty.tcp"]

akka { 
    actor { 
    provider = "akka.cluster.ClusterActorRefProvider" 
    } 
    remote { 
    enabled-transports = ["akka.remote.netty.tcp"] <--added this from remoting 
    log-remote-lifecycle-events = off 
    netty.tcp { 
     hostname = "127.0.0.1" 
     port = 0 
    } 
    } 
    cluster { 
    seed-nodes = [ 
    "akka.tcp://ClusterSystem@127.0.0.1:2551", 
    "akka.tcp://ClusterSystem@127.0.0.1:2552"] 

    auto-down = on 
    } 
} 

avvio il 2 nodi, ciascuno in diverse finestre SBT

run-main sample.cluster.simple.SimpleClusterApp 2551 
run-main sample.cluster.simple.SimpleClusterApp 2552 

Entrambe vanno bene, quindi mostrano ripetutamente un messaggio ERROR:

mybuild:-:0.0.1-SNAPSHOT>`run-main sample.cluster.simple.SimpleClusterApp 2552` 
[warn] Credentials file C:\Users\amocanu\.ivy2\.credentials does not exist <-- ? 
[info] Running sample.cluster.simple.SimpleClusterApp 2552 
args[0]= 2552 
[INFO] [07/31/2013 10:50:00.397] [run-main] [Remoting] Starting remoting 
[INFO] [07/31/2013 10:50:00.661] [run-main] [Remoting] Remoting started; listeni 
ng on addresses :[akka.tcp://AdriansClusterSystem@127.0.0.1:2552] 
[INFO] [07/31/2013 10:50:00.710] [run-main] [Cluster(akka://AdriansClusterSystem 
)] Cluster Node [akka.tcp://AdriansClusterSystem@127.0.0.1:2552] - Starting up.. 
. 
[INFO] [07/31/2013 10:50:00.823] [run-main] [Cluster(akka://AdriansClusterSystem 
)] Cluster Node [akka.tcp://AdriansClusterSystem@127.0.0.1:2552] - Registered cl 
uster JMX MBean [akka:type=Cluster] 
[INFO] [07/31/2013 10:50:00.823] [run-main] [Cluster(akka://AdriansClusterSystem 
)] Cluster Node [akka.tcp://AdriansClusterSystem@127.0.0.1:2552] - Started up su 
ccessfully 
[INFO] [07/31/2013 10:50:00.868] [AdriansClusterSystem-akka.actor.default-dispat 
cher-2] [Cluster(akka://AdriansClusterSystem)] Cluster Node [akka.tcp://AdriansC 
lusterSystem@127.0.0.1:2552] - Metrics will be retreived from MBeans, and may be 
incorrect on some platforms. To increase metric accuracy add the 'sigar.jar' to 
the classpath and the appropriate platform-specific native libary to 'java.libr 
ary.path'. Reason: java.lang.ClassNotFoundException: org.hyperic.sigar.Sigar 
[INFO] [07/31/2013 10:50:00.874] [AdriansClusterSystem-akka.actor.default-dispat 
cher-2] [Cluster(akka://AdriansClusterSystem)] Cluster Node [akka.tcp://AdriansC 
lusterSystem@127.0.0.1:2552] - Metrics collection has started successfully 
[INFO] [07/31/2013 10:50:00.883] [AdriansClusterSystem-akka.actor.default-dispat 
cher-13] [akka://AdriansClusterSystem/user/clusterListener] Current members: 
[ERROR] [07/31/2013 10:50:01.003] [AdriansClusterSystem-akka.actor.default-dispa 
tcher-3] [akka://AdriansClusterSystem/system/endpointManager/reliableEndpointWri 
ter-akka.tcp%3A%2F%2FAdriansClusterSystem%40127.0.0.1%3A2551-0/endpointWriter] d 
ropping message [class akka.actor.SelectChildName] for non-local recipient [Acto 
r[akka.tcp://ClusterSystem@127.0.0.1:2552/]] arriving at [akka.tcp://ClusterSyst 
em@127.0.0.1:2552] inbound addresses are [akka.tcp://AdriansClusterSystem@127.0. 
0.1:2552] 
[ERROR] [07/31/2013 10:50:01.009] [AdriansClusterSystem-akka.actor.default-dispa 
tcher-16] [akka://AdriansClusterSystem/system/endpointManager/reliableEndpointWr 
iter-akka.tcp%3A%2F%2FAdriansClusterSystem%40127.0.0.1%3A2552-3/endpointWriter] 
dropping message [class akka.actor.SelectChildName] for non-local recipient [Act 
or[akka.tcp://ClusterSystem@127.0.0.1:2552/]] arriving at [akka.tcp://ClusterSys 
tem@127.0.0.1:2552] inbound addresses are [akka.tcp://AdriansClusterSystem@127.0 
.0.1:2552] 

Se ora faccio

run-main sample.cluster.simple.SimpleClusterApp 

che dovrebbe scegliere una porta casuale ed eseguire un nodo seme, inizia di benessere così come gli altri nodi 2 del seme, poi mostra una classe non trovata eccezione come INFO e nessun utente corrente

[INFO] [07/31/2013 11:19:36.612] [AdriansClusterSystem-akka.actor.default-dispat 
cher-3] [Cluster(akka://AdriansClusterSystem)] Cluster Node [akka.tcp://AdriansC 
lusterSystem@127.0.0.1:54824] - Metrics will be retreived from MBeans, and may b 
e incorrect on some platforms. To increase metric accuracy add the 'sigar.jar' t 
o the classpath and the appropriate platform-specific native libary to 'java.lib 
rary.path'. Reason: java.lang.ClassNotFoundException: org.hyperic.sigar.Sigar 
[INFO] [07/31/2013 11:19:36.619] [AdriansClusterSystem-akka.actor.default-dispat 
cher-3] [Cluster(akka://AdriansClusterSystem)] Cluster Node [akka.tcp://AdriansC 
lusterSystem@127.0.0.1:54824] - Metrics collection has started successfully 
[INFO] [07/31/2013 11:19:36.633] [AdriansClusterSystem-akka.actor.default-dispat 
cher-12] [akka://AdriansClusterSystem/user/clusterListener] Current members: 

Yup appende appena là e devo chiudere la finestra sbt di porvi fine.

Answer 1

Sembra che i nodi seme utilizzino ClusterSystem come nome di sistema dell'attore, ma in base ai registri si utilizza AdriansClusterSystem come nome del sistema per gli attori. Prova a cambiare i nodi seme in:

seed-nodes = [ 
"akka.tcp://AdriansClusterSystem@127.0.0.1:2551", 
"akka.tcp://AdriansClusterSystem@127.0.0.1:2552"]