Greetings,
I modified ActorWordCount example a little and it uses simple case class as the
message for Streaming instead of the primitive string.
I also modified launch code to not use run-example script, but set spark master
in the code and attach the jar (setJars(...)) with all the classes including
new case class. It runs fine in the local[*] mode but fails with
ClassNotFoundException in standalone cluster (stacktrace follows).
I assume it's the classloader problems and akka remoting just doesn't know
about the classes coming to the executor from attached jar.
Am I right?
I guess I could pass primitive values around and do my own (de)serialization
but maybe there is a better way?
What's the correct way to build custom akka-based receiver with usage of
non-primitive messages?
Here is the log excerpt with stacktrace:
14/08/04 20:59:41 DEBUG RecurringTimer: Callback for BlockGenerator called at
time 1407211181800
14/08/04 20:59:41 ERROR Remoting:
com.genesys.gpe.analytics.akka.messages.SubscribeAck
java.lang.ClassNotFoundException:
com.genesys.gpe.analytics.akka.messages.SubscribeAck
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:623)
at
akka.util.ClassLoaderObjectInputStream.resolveClass(ClassLoaderObjectInputStream.scala:19)
at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1610)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1515)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at
akka.serialization.JavaSerializer$$anonfun$1.apply(Serializer.scala:136)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
at akka.serialization.JavaSerializer.fromBinary(Serializer.scala:136)
at
akka.serialization.Serialization$$anonfun$deserialize$1.apply(Serialization.scala:104)
at scala.util.Try$.apply(Try.scala:161)
at akka.serialization.Serialization.deserialize(Serialization.scala:98)
at
akka.remote.MessageSerializer$.deserialize(MessageSerializer.scala:23)
at
akka.remote.DefaultMessageDispatcher.payload$lzycompute$1(Endpoint.scala:55)
at akka.remote.DefaultMessageDispatcher.payload$1(Endpoint.scala:55)
at akka.remote.DefaultMessageDispatcher.dispatch(Endpoint.scala:73)
at
akka.remote.EndpointReader$$anonfun$receive$2.applyOrElse(Endpoint.scala:764)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:498)
at akka.actor.ActorCell.invoke(ActorCell.scala:456)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:237)
at akka.dispatch.Mailbox.run(Mailbox.scala:219)
at
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at
scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
WBR,
Anton
