spark org.apache.spark.ml.linalg.DenseVector cannot be cast to org.apache.spark.ml.linalg.SparseVect
在使用 import org.apache.spark.ml.feature.VectorAssembler 轉換特徵後，想要放入 import org.apache.spark.mllib.classification.SVMWithSGD 去訓練的時候出現錯誤：java
Caused by: java.lang.ClassCastException: org.apache.spark.ml.linalg.DenseVector cannot be cast to org.apache.spark.ml.linalg.SparseVector
修改以下：apache
val trainDataFrame = dataframe.rdd.map(r => LabeledPoint(
r.getAs[Double]("label"),
org.apache.spark.mllib.linalg.Vectors.fromML(r.getAs[org.apache.spark.ml.linalg.SparseVector]("features").toDense)
))
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- 1. cannot be cast to org.springframework.web.accept.ContentNegotiationManager
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