This is a known issue: https://issues.apache.org/jira/browse/SPARK-2197 . Joseph is working on it. -Xiangrui
On Mon, Jul 21, 2014 at 4:20 PM, Jack Yang <j...@uow.edu.au> wrote: > So this is a bug unsolved (for java) yet? > > > > From: Jack Yang [mailto:j...@uow.edu.au] > Sent: Friday, 18 July 2014 4:52 PM > To: user@spark.apache.org > Subject: error from DecisonTree Training: > > > > Hi All, > > I got an error while using DecisionTreeModel (my program is written in Java, > spark 1.0.1, scala 2.10.1). > > I have read a local file, loaded it as RDD, and then sent to decisionTree > for training. See below for details: > > > > JavaRDD<LabeledPoint> Points = lines.map(new ParsePoint()).cache(); > > LogisticRegressionModel model = > LogisticRegressionWithSGD.train(Points.rdd(),iterations, stepSize); // > until here it is working > > Strategy strategy = new Strategy( ….); > > DecisionTree decisionTree = new DecisionTree(strategy); > > DecisionTreeModel decisionTreeModel = decisionTree.train(Points.rdd()); > > > > > > The error is : java.lang.ClassCastException: [Ljava.lang.Object; cannot be > cast to [Lorg.apache.spark.mllib.regression.LabeledPoint; > > > > Any thoughts? > > > > Best regards, > > Jack > >
