On 29 Jun 2015, at 11:27, Iulian Dragoș <iulian.dra...@typesafe.com<mailto:iulian.dra...@typesafe.com>> wrote:
On Mon, Jun 29, 2015 at 3:02 AM, Alessandro Baretta <alexbare...@gmail.com<mailto:alexbare...@gmail.com>> wrote: I am building the current master branch with Scala 2.11 following these instructions: Type :help for more information. 15/06/29 00:42:20 ERROR ActorSystemImpl: Uncaught fatal error from thread [sparkDriver-akka.remote.default-remote-dispatcher-6] shutting down ActorSystem [sparkDriver] java.lang.VerifyError: class akka.remote.WireFormats$AkkaControlMessage overrides final method getUnknownFields.()Lcom/google/protobuf/UnknownFieldSet; at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at akka.remote.transport.AkkaPduProtobufCodec$.constructControlMessagePdu(AkkaPduCodec.scala:231) at akka.remote.transport.AkkaPduProtobufCodec$.<init>(AkkaPduCodec.scala:153) at akka.remote.transport.AkkaPduProtobufCodec$.<clinit>(AkkaPduCodec.scala) at akka.remote.EndpointManager$$anonfun$9.apply(Remoting.scala:733) at akka.remote.EndpointManager$$anonfun$9.apply(Remoting.scala:703) What am I doing wrong? oh, that's just the version of the protoc protobuf compiler generating code that implementation classes aren't compatible with, and/or the version of probuf.jar on the classpath. Google's libraries are turning out to be surprisingly brittle that way. when you type protoc --version on the command line, you should expect to see, "libprotoc 2.5.0'; and have protobuf-2.5.0 on the classpath. If neither of those conditions are met: fix them -Steve
