Akka.actor.dispatcher NoSuchMethod exception - scala

Question

I am trying to learn about Akka actors and I am running the following example. My problem is that when I run though the Idea IDE it works perfectly fine. But when I run it using the jar created by sbt assembly it throws a NoSuchMethodException java.lang.NoSuchMethodError: akka.actor.ActorSystem.dispatcher()Lscala/concurrent/ExecutionContextExecutor Exception which I cannot debug because it works fine in the IDE.
object Runner {
def main(args: Array[String]) {
run()
}
def run() = {
val system = ActorSystem("my-system")
import system.dispatcher
val props = Props[Manager]
val pool = mutable.ArrayBuffer.empty[(Int, ActorRef)]
for (i <- 1 to 10) {
pool += ((i, system.actorOf(props)))
}
val futures = pool.map {
case (x: Int, y: ActorRef) =>
val future = ask(y, Echo(x))(Timeout(100 seconds)).mapTo[Int]
println(future.toString)
future
}
/*Next line causes Exception*/
val futureList = Future.sequence(futures)
val result = futureList.map(x => {
x.sum
})
result onSuccess {
case sum => println(sum)
}
pool.foreach(x => system.stop(x._2))
system.shutdown()
}
}
The sbt file I am using is the following.
lazy val commonSettings = Seq(
organization := "foobar",
version := "1.0",
scalaVersion := "2.10.6",
test in assembly := {}
)
lazy val root = (project).aggregate(redis).settings(commonSettings: _*).
settings(
name := "scala_code_root",
version := "1.0",
scalaVersion := "2.10.6"
exportJars := false
)
lazy val myakka =(project in file("myakka")).settings(commonSettings: _*).settings(
libraryDependencies += "com.typesafe.akka" % "akka-actor_2.10" % "2.3.15"
)
The exception is thrown at the line val futureList = Future.sequence(futures). Apparently the method is trere because both IDEA and sbt-assembly use the same sbt file. What could be the cause of the Exception?