Abstract method error when combining akka 2.3.7, reactive mongo and spray

Question

Application dependencies are:

com.typesafe.akka#akka-actor_2.10;2.3.7
org.reactivemongo#reactivemongo_2.10:0.10.5.0.akka23
org.reactivemongo#play2-reactivemongo_2.10:0.10.5.0.akka23

and a couple of spray libs all of version 1.3.1 When starting the appliction I get

java.lang.AbstractMethodError
    at akka.actor.ActorCell.create(ActorCell.scala:580)
    at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:456)
    at akka.actor.ActorCell.systemInvoke(ActorCell.scala:478)
    at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:279)
    at akka.dispatch.Mailbox.run(Mailbox.scala:220)
    at akka.dispatch.Mailbox.exec(Mailbox.scala:231)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

PS: I do not use any akka 2.2 compatible libs and I did read similar topics here(the only solution there was to update play from 2.2 to 2.3)

Answer 1

I had that error once and it was due to having libraries that depended on different version of Scala. Some required Scala 2.10 and others (I think it were the Akka ones) required Scala 2.11. You should check that out