java.util.NoSuchElementException: key not found: 166

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java.util.NoSuchElementException: key not found: 166
at scala.collection.MapLike$class.default(MapLike.scala:228)
at scala.collection.AbstractMap.default(Map.scala:58)
at scala.collection.MapLike$class.apply(MapLike.scala:141)
at org.apache.spark.mllib.clustering.BisectingKMeans$$anonfun$org$apache$spark$mllib$clustering$BisectingKMeans$$updateAssignments$1$$anonfun$2.apply$mcDJ$sp(BisectingKMeans.scala:338)
at org.apache.spark.mllib.clustering.BisectingKMeans$$anonfun$org$apache$spark$mllib$clustering$BisectingKMeans$$updateAssignments$1$$anonfun$2.apply(BisectingKMeans.scala:337)
at scala.collection.TraversableOnce$$anonfun$minBy$1.apply(TraversableOnce.scala:231)
at scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:111)
at scala.collection.immutable.List.foldLeft(List.scala:84)
at scala.collection.LinearSeqOptimized$class.reduceLeft(LinearSeqOptimized.scala:125)
at scala.collection.immutable.List.reduceLeft(List.scala:84)
at scala.collection.TraversableOnce$class.minBy(TraversableOnce.scala:231)
at org.apache.spark.mllib.clustering.BisectingKMeans$$anonfun$org$apache$spark$mllib$clustering$BisectingKMeans$$updateAssignments$1.apply(BisectingKMeans.scala:337)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)

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