spray, akka - java.lang.OutOfMemoryError: unable to create new native thread

[Rahul Dev]

While checking the throughput of spray api.

Scenario: 25 concurrent users

Os: Free BSD

Memory: 2GB

No Of Cores: 2

At around 10 concurrent users system started giving following error.

[ERROR] [06/29/2015 05:01:56.407] [default-akka.actor.default-dispatcher-2]     [ActorSystem(default)] Uncaught error from thread [default-akka.actor.default-dispatcher-2] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled

    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.tryAddWorker(ForkJoinPool.java:1672)

        at scala.concurrent.forkjoin.ForkJoinPool.deregisterWorker(ForkJoinPool.java:1795)

        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:117)

Akka and Spray Conf changes from default:

    akka{

   tcp{

   register-timeout = 20s

   }

    }

    spray.can {

   request-timeout = 30 s

   bind-timeout = 30s

        unbind-timeout = 5s

        registration-timeout = 30s

    }

    http.spray.can {

   server{

    pipelining-limit = 50

   }

    }

What is causing the OutOfMemmoryError. The exception is thrown from the router actor

[Mathias Doenitz]

Rahul,

> What is causing the OutOfMemmoryError. The exception is thrown from the router actor

without knowing anything more about your application it will be impossible for us to answer your question.
An OOME is often caused by a memory leak of some kind.
In this case I’d assume that the root cause is somewhere in your application code rather than spray.
Maybe you are not stopping all the actors that you are spawning?

Cheers,
Mathias

---
mat...@spray.io
http://spray.io

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