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java.lang.OutOfMemoryError: unable to create new native thread when use actor #8937

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scabug opened this issue Oct 23, 2014 · 3 comments
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java.lang.OutOfMemoryError: unable to create new native thread when use actor #8937

scabug opened this issue Oct 23, 2014 · 3 comments
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@scabug
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scabug commented Oct 23, 2014 

java.lang.OutOfMemoryError: unable to create new native thread
	at java.lang.Thread.start0(Native Method)
	at java.lang.Thread.start(Thread.java:597)
	at scala.concurrent.forkjoin.ForkJoinPool.createAndStartAddedWorkers(ForkJoinPool.java:524)
	at scala.concurrent.forkjoin.ForkJoinPool.setParallelism(ForkJoinPool.java:749)
	at scala.actors.scheduler.ForkJoinScheduler.makeNewPool(ForkJoinScheduler.scala:44)
	at scala.actors.scheduler.ForkJoinScheduler.<init>(ForkJoinScheduler.scala:15)
	at scala.actors.scheduler.ForkJoinScheduler.<init>(ForkJoinScheduler.scala:29)
	at scala.actors.scheduler.ForkJoinScheduler.<init>(ForkJoinScheduler.scala:33)
	at scala.actors.scheduler.ForkJoinScheduler.<init>(ForkJoinScheduler.scala:37)
	at scala.actors.Scheduler$.makeNewScheduler(Scheduler.scala:33)
	at scala.actors.scheduler.DelegatingScheduler$class.newActor(DelegatingScheduler.scala:63)
	at scala.actors.Scheduler$.newActor(Scheduler.scala:21)
	at scala.actors.Reactor$class.dostart(Reactor.scala:221)
	at scala.actors.Actor$$anon$1.scala$actors$Actor$$super$dostart(Actor.scala:132)
	at scala.actors.Actor$class.dostart(Actor.scala:709)
	at scala.actors.Actor$$anon$1.dostart(Actor.scala:132)
	at scala.actors.Reactor$class.start(Reactor.scala:230)
	at scala.actors.Actor$$anon$1.scala$actors$Actor$$super$start(Actor.scala:132)
	at scala.actors.Actor$class.start(Actor.scala:713)
	at scala.actors.Actor$$anon$1.start(Actor.scala:132)
	at scala.actors.Actor$.actor(Actor.scala:136)
	at Main$$anon$1$$anonfun$isPerfectConcurrent$1.apply(testActor.scala:18)
	at Main$$anon$1$$anonfun$isPerfectConcurrent$1.apply(testActor.scala:14)
	at scala.collection.immutable.Range.foreach(Range.scala:81)
	at Main$$anon$1.isPerfectConcurrent(testActor.scala:14)
	at Main$$anon$1.<init>(testActor.scala:32)
	at Main$.main(testActor.scala:1)
	at Main.main(testActor.scala)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at scala.tools.nsc.util.ScalaClassLoader$$anonfun$run$1.apply(ScalaClassLoader.scala:78)
	at scala.tools.nsc.util.ScalaClassLoader$class.asContext(ScalaClassLoader.scala:24)
	at scala.tools.nsc.util.ScalaClassLoader$URLClassLoader.asContext(ScalaClassLoader.scala:88)
	at scala.tools.nsc.util.ScalaClassLoader$class.run(ScalaClassLoader.scala:78)
	at scala.tools.nsc.util.ScalaClassLoader$URLClassLoader.run(ScalaClassLoader.scala:101)
	at scala.tools.nsc.ObjectRunner$.run(ObjectRunner.scala:33)
	at scala.tools.nsc.ObjectRunner$.runAndCatch(ObjectRunner.scala:40)
	at scala.tools.nsc.ScriptRunner.scala$tools$nsc$ScriptRunner$$runCompiled(ScriptRunner.scala:171)
	at scala.tools.nsc.ScriptRunner$$anonfun$runScript$1.apply(ScriptRunner.scala:188)
	at scala.tools.nsc.ScriptRunner$$anonfun$runScript$1.apply(ScriptRunner.scala:188)
	at scala.tools.nsc.ScriptRunner$$anonfun$withCompiledScript$1.apply$mcZ$sp(ScriptRunner.scala:157)
	at scala.tools.nsc.ScriptRunner$$anonfun$withCompiledScript$1.apply(ScriptRunner.scala:131)
	at scala.tools.nsc.ScriptRunner$$anonfun$withCompiledScript$1.apply(ScriptRunner.scala:131)
	at scala.tools.nsc.util.package$.waitingForThreads(package.scala:26)
	at scala.tools.nsc.ScriptRunner.withCompiledScript(ScriptRunner.scala:130)
	at scala.tools.nsc.ScriptRunner.runScript(ScriptRunner.scala:188)
	at scala.tools.nsc.ScriptRunner.runScriptAndCatch(ScriptRunner.scala:201)
	at scala.tools.nsc.MainGenericRunner.runTarget$1(MainGenericRunner.scala:58)
	at scala.tools.nsc.MainGenericRunner.process(MainGenericRunner.scala:80)
	at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:89)
	at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)

and my codes：

def sumOfFactorsInRange(lower: Int, upper: Int, number: Int) = {
  (0 /: (lower to upper)) {
    (sum, i) => if (number % i == 0) sum + i else sum
  }
}

def isPerfectConcurrent(candidate: Int) = {
  val RANGE = 100000
  val numberOfPartitions = (candidate.toDouble / RANGE).ceil.toInt
  val caller = self

  for (i <- 0 until numberOfPartitions) {
    val lower = i * RANGE + 1
    val upper = candidate min (i + 1) * RANGE

    actor {
      caller ! sumOfFactorsInRange(lower, upper, candidate)
    }
  }

  val sum = (0 /: (0 until numberOfPartitions)) {
    (partialSum, i) =>
      receive {
        case sumInRange: Int => partialSum + sumInRange
      }
  }

  2 * candidate == sum
}

println("6 is perfect? " + isPerfectConcurrent(6))
@scabug
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scabug commented Oct 23, 2014

Imported From: https://issues.scala-lang.org/browse/SI-8937?orig=1
Reporter: eugene (sf0606)

@scabug
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scabug commented Oct 24, 2014

@retronym said (edited on Oct 24, 2014 11:13:51 AM UTC):
The Scala actors library is deprecated, we advise users to migrate to Akka actors now.

I am not able to reproduce the error locally.

% ~/scala/2.11/bin/scalac sandbox/test.scala && ~/scala/2.11/bin/scala -nc Test
warning: there were three deprecation warnings; re-run with -deprecation for details
one warning found
6 is perfect? true

% ~/scala/2.10.4/bin/scalac sandbox/test.scala && ~/scala/2.10.4/bin/scala  -nc Test
6 is perfect? true

Can you please provide a transcript from a shell session that reproduces the error? Which Scala version are you using?

@scabug scabug closed this as completed Oct 24, 2014
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scabug commented Oct 28, 2014

eugene (sf0606) said:
Thank you, i found some problems in my dev-envirment, it`s a problem about Java.

@scabug scabug added the needinfo label Apr 7, 2017
@scabug scabug added this to the Backlog milestone Apr 7, 2017
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