akkaのdispatcherでOOM

actor.scala

import akka.actor.{Actor, ActorSystem, Props}
import scala.concurrent.{blocking, Future}

object OOM extends App {
  val system = ActorSystem()
  val actor = system.actorOf(Props[OOMActor])
  (1 to 10000).foreach(actor ! _)
  Thread.sleep(10000)
  system.terminate()
}


class OOMActor extends Actor {
  override def receive: Receive = { case i => Future(blocking(Thread.sleep(1000)))(context.dispatcher) }
}

build.sbt

name := """akka-sandbox"""

version := "1.0"

scalaVersion := "2.11.8"

lazy val akkaVersion = "2.4.8"

libraryDependencies ++= Seq(
  "com.typesafe.akka" %% "akka-actor" % akkaVersion
)

javaOptions += "-Xmx1G"
javaOptions += "-Xms1G"

result.log

Uncaught error from thread [default-akka.actor.default-dispatcher-2028] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled for ActorSystem[default]
java.lang.OutOfMemoryError: unable to create new native thread
	at java.lang.Thread.start0(Native Method)
	at java.lang.Thread.start(Thread.java:714)
	at scala.concurrent.forkjoin.ForkJoinPool.tryCompensate(ForkJoinPool.java:2343)
	at scala.concurrent.forkjoin.ForkJoinPool.managedBlock(ForkJoinPool.java:3638)
	at akka.dispatch.MonitorableThreadFactory$AkkaForkJoinWorkerThread.blockOn(ThreadPoolBuilder.scala:167)
	at scala.concurrent.package$.blocking(package.scala:123)
	at OOMActor$$anonfun$receive$1$$anonfun$applyOrElse$1.apply$mcV$sp(OOM.scala:16)
	at OOMActor$$anonfun$receive$1$$anonfun$applyOrElse$1.apply(OOM.scala:16)
	at OOMActor$$anonfun$receive$1$$anonfun$applyOrElse$1.apply(OOM.scala:16)
	at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
	at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40)
	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)