Akka timeout exception

[danyaljj]

! @700efhel8 - Internal server error, for (GET) [/working/prog?record=730] ->

play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[AskTimeoutException: Ask timed out on [Actor[akka://application/user/$a#-948062154]] after [60000 ms]]]
        at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:265) ~[play_2.11-2.4.3.jar:2.4.3]
        at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:191) ~[play_2.11-2.4.3.jar:2.4.3]
        at play.api.GlobalSettings$class.onError(GlobalSettings.scala:179) [play_2.11-2.4.3.jar:2.4.3]
        at play.api.DefaultGlobal$.onError(GlobalSettings.scala:212) [play_2.11-2.4.3.jar:2.4.3]
        at play.api.http.GlobalSettingsHttpErrorHandler.onServerError(HttpErrorHandler.scala:94) [play_2.11-2.4.3.jar:2.4.3]
        at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$9$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:158) [play-netty-server_2.11-2.4.3.jar:2.4.3]
        at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$9$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:155) [play-netty-server_2.11-2.4.3.jar:2.4.3]
        at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:36) [scala-library-2.11.7.jar:na]
        at scala.util.Failure$$anonfun$recover$1.apply(Try.scala:216) [scala-library-2.11.7.jar:na]
        at scala.util.Try$.apply(Try.scala:192) [scala-library-2.11.7.jar:na]
        at scala.util.Failure.recover(Try.scala:216) [scala-library-2.11.7.jar:na]
        at scala.concurrent.Future$$anonfun$recover$1.apply(Future.scala:324) [scala-library-2.11.7.jar:na]
        at scala.concurrent.Future$$anonfun$recover$1.apply(Future.scala:324) [scala-library-2.11.7.jar:na]
        at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) [scala-library-2.11.7.jar:na]
        at play.api.libs.iteratee.Execution$trampoline$.executeScheduled(Execution.scala:109) [play-iteratees_2.11-2.4.3.jar:2.4.3]
        at play.api.libs.iteratee.Execution$trampoline$.execute(Execution.scala:71) [play-iteratees_2.11-2.4.3.jar:2.4.3]
        at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40) [scala-library-2.11.7.jar:na]
        at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248) [scala-library-2.11.7.jar:na]
        at scala.concurrent.Promise$class.complete(Promise.scala:55) [scala-library-2.11.7.jar:na]
        at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153) [scala-library-2.11.7.jar:na]
        at scala.concurrent.Future$$anonfun$map$1.apply(Future.scala:235) [scala-library-2.11.7.jar:na]
        at scala.concurrent.Future$$anonfun$map$1.apply(Future.scala:235) [scala-library-2.11.7.jar:na]
        at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) [scala-library-2.11.7.jar:na]
        at play.core.j.HttpExecutionContext$$anon$2.run(HttpExecutionContext.scala:40) [play_2.11-2.4.3.jar:2.4.3]
        at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40) [akka-actor_2.11-2.3.13.jar:na]
        at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397) [akka-actor_2.11-2.3.13.jar:na]
        at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [scala-library-2.11.7.jar:na]
        at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [scala-library-2.11.7.jar:na]
        at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [scala-library-2.11.7.jar:na]
        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [scala-library-2.11.7.jar:na]
Caused by: akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://application/user/$a#-948062154]] after [60000 ms]
        at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:334) ~[akka-actor_2.11-2.3.13.jar:na]
        at akka.actor.Scheduler$$anon$7.run(Scheduler.scala:117) ~[akka-actor_2.11-2.3.13.jar:na]
        at scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:599) ~[scala-library-2.11.7.jar:na]
        at scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109) ~[scala-library-2.11.7.jar:na]
        at scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:597) ~[scala-library-2.11.7.jar:na]
        at akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(Scheduler.scala:467) ~[akka-actor_2.11-2.3.13.jar:na]
        at akka.actor.LightArrayRevolverScheduler$$anon$8.executeBucket$1(Scheduler.scala:419) ~[akka-actor_2.11-2.3.13.jar:na]
        at akka.actor.LightArrayRevolverScheduler$$anon$8.nextTick(Scheduler.scala:423) ~[akka-actor_2.11-2.3.13.jar:na]
        at akka.actor.LightArrayRevolverScheduler$$anon$8.run(Scheduler.scala:375) ~[akka-actor_2.11-2.3.13.jar:na]
        at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_31]
[error] - akka.actor.OneForOneStrategy - Message is null
akka.actor.InvalidMessageException: Message is null
        at akka.pattern.PromiseActorRef.$bang(AskSupport.scala:265) ~[akka-actor_2.11-2.3.13.jar:na]
        at akka.actor.ActorRef.tell(ActorRef.scala:123) ~[akka-actor_2.11-2.3.13.jar:na]
        at actors.MasterActor.onReceive(MasterActor.java:57) ~[classes/:na]
        at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:167) ~[akka-actor_2.11-2.3.13.jar:na]
        at akka.actor.Actor$class.aroundReceive(Actor.scala:467) ~[akka-actor_2.11-2.3.13.jar:na]
        at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:97) ~[akka-actor_2.11-2.3.13.jar:na]
        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516) [akka-actor_2.11-2.3.13.jar:na]
        at akka.actor.ActorCell.invoke(ActorCell.scala:487) [akka-actor_2.11-2.3.13.jar:na]
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238) [akka-actor_2.11-2.3.13.jar:na]
        at akka.dispatch.Mailbox.run(Mailbox.scala:220) [akka-actor_2.11-2.3.13.jar:na]
        at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397) [akka-actor_2.11-2.3.13.jar:na]
        at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [scala-library-2.11.7.jar:na]
        at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [scala-library-2.11.7.jar:na]
        at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [scala-library-2.11.7.jar:na]
        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [scala-library-2.11.7.jar:na]