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java.lang.NullPointerException: 	at data.DefaultExchanger.importData(DefaultExchanger.java:251)	at data.DataService.importData(DataService.java:196)	at controllers.SiteApp.importData(SiteApp.java:314)	at Routes$$anonfun$routes$1$$anonfun$applyOrElse$54$$anonfun$apply$54.apply(routes_routing.scala:2058)	at Routes$$anonfun$routes$1$$anonfun$applyOrElse$54$$anonfun$apply$54.apply(routes_routing.scala:2058)	at play.core.Router$HandlerInvokerFactory$$anon$4.resultCall(Router.scala:264)	at play.core.Router$HandlerInvokerFactory$JavaActionInvokerFactory$$anon$15$$anon$1.invocation(Router.scala:255)	at play.core.j.JavaAction$$anon$1.call(JavaAction.scala:55)	at Global$1.call(Global.java:190)	at actions.AnonymousCheckAction.call(AnonymousCheckAction.java:57)	at utils.SiteManagerAuthAction.call(SiteManagerAuthAction.java:39)	at play.core.j.JavaAction$$anonfun$11.apply(JavaAction.scala:82)	at play.core.j.JavaAction$$anonfun$11.apply(JavaAction.scala:82)	at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)	at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)	at play.core.j.HttpExecutionContext$$anon$2.run(HttpExecutionContext.scala:40)	at play.api.libs.iteratee.Execution$trampoline$.execute(Execution.scala:46)	at play.core.j.HttpExecutionContext.execute(HttpExecutionContext.scala:32)	at scala.concurrent.impl.Future$.apply(Future.scala:31)	at scala.concurrent.Future$.apply(Future.scala:485)	at play.core.j.JavaAction$class.apply(JavaAction.scala:82)	at play.core.Router$HandlerInvokerFactory$JavaActionInvokerFactory$$anon$15$$anon$1.apply(Router.scala:252)	at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:130)	at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:130)	at play.utils.Threads$.withContextClassLoader(Threads.scala:21)	at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:129)	at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:128)	at scala.Option.map(Option.scala:145)	at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:128)	at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:121)	at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:483)	at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:483)	at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:519)	at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:519)	at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:496)	at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:496)	at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)	at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393)	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)