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Operation attempted on non Ratpack managed thread 'RxCachedThreadScheduler-1' at ratpack.exec.internal.ThreadBinding$$Lambda$142/1242833563.get(Unknown Source)
ratpack.exec.UnmanagedThreadException: Operation attempted on non Ratpack managed thread 'RxCachedThreadScheduler-1'
	at ratpack.exec.internal.ThreadBinding$$Lambda$142/1242833563.get(Unknown Source)	at java.util.Optional.orElseThrow(Optional.java:290)	at ratpack.exec.internal.ThreadBinding.requireComputeThread(ThreadBinding.java:55)	at ratpack.exec.internal.DefaultPromise.then(DefaultPromise.java:38)	at ratpack.rx.RxRatpack$ErrorHandler.handleError(RxRatpack.java:742)	at rx.internal.util.RxJavaPluginUtils.handleException(RxJavaPluginUtils.java:24)	at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:155)	at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)	at ratpack.rx.RxRatpack$ExecutionBackedSubscriber.onError(RxRatpack.java:781)	at rx.internal.operators.OperatorToObservableList$1.onError(OperatorToObservableList.java:99)	at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4$1.onError(OperatorOnErrorResumeNextViaFunction.java:121)	at rx.Observable$ThrowObservable$1.call(Observable.java:10562)	at rx.Observable$ThrowObservable$1.call(Observable.java:10552)	at rx.Observable.unsafeSubscribe(Observable.java:8644)	at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:141)	at rx.internal.operators.OperatorSubscribeOn$1$1.onError(OperatorSubscribeOn.java:59)	at rx.exceptions.Exceptions.throwOrReport(Exceptions.java:202)	at rx.internal.operators.OnSubscribeFromCallable.call(OnSubscribeFromCallable.java:34)	at rx.internal.operators.OnSubscribeFromCallable.call(OnSubscribeFromCallable.java:17)	at rx.Observable.unsafeSubscribe(Observable.java:8644)	at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)	at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)