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    In Scala, don’t use the get method with Option to access a result. Use getOrElse, a match expression, or foreach instead.

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via Google Groups by Luciano Joublanc, 1 year ago
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java.util.NoSuchElementException: None.get	at scala.None$.get(Option.scala:344)	at scala.None$.get(Option.scala:342)	at org.mongodb.scala.internal.FlatMapObservable$$anon$1$$anon$3.onComplete(FlatMapObservable.scala:97)	at com.dinogroup.scarctic.util.package$$anon$1.subscribe(util.scala:14)