Could not initialize class scala.util.control.NonFatal$

[Hua Jiang]

Executing the following code reports NoClassDefFoundError's occasionally. And It seem more likely the error is thrown with a higher upperbound. What's going wrong here?

Exception in thread "pool-1-thread-1" java.lang.NoClassDefFoundError: Could not initialize class scala.util.control.NonFatal$

        at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:29)

        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

        at java.lang.Thread.run(Thread.java:722)

Here is the code:

import java.util.concurrent.ThreadPoolExecutor

import java.util.concurrent.TimeUnit

import java.util.concurrent.ArrayBlockingQueue

import ThreadPoolExecutor._

import scala.concurrent._

import scala.concurrent.duration._

implicit val context = ExecutionContext.fromExecutorService(

  new ThreadPoolExecutor(

    5, 5,

    0L, TimeUnit.SECONDS,

    new ArrayBlockingQueue[Runnable](5),

    new CallerRunsPolicy

  )

)

def reduce(a: Future[Long], b: Future[Long]) = {

  a.flatMap(v => b.map(v + _))

}

val upperbound = 100000

val sum = (1 to upperbound).toIterator.map(i => future(i.toLong)).reduce(reduce)

println(Await.result(sum, Duration.Inf))

context.shutdown

[Roland Kuhn]

Hi Hua Jiang,

are you sure that you have the same version of scala-library.jar on the classpath when compiling and running your program?

Regards,

Roland

--
You received this message because you are subscribed to the Google Groups "scala-user" group.
To unsubscribe from this group and stop receiving emails from it, send an email to scala-user+...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.

Dr. Roland Kuhn
Akka Tech Lead
Typesafe – Reactive apps on the JVM.
twitter: @rolandkuhn

[Jason Zaugg]

I suspect you are getting a stack overflow and an exemption handler is trying to load the class NonFatal to call a method there to decide whether or not to catch it. That class loading itself triggers another SOE. To test the theory, add a reference to NonFatal at the start of your program.