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Hi,
I get this error message when training a classification model with MLLib
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - java.lang.IllegalArgumentException: No rows in train dataframe after target remap. Target empty? Type mismatch?
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.MLLibPredictionJob$$anonfun$prepare$1.apply$mcV$sp(MLLibPredictionJob.scala:216)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.MLLibPredictionJob$$anonfun$prepare$1.apply(MLLibPredictionJob.scala:212)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.MLLibPredictionJob$$anonfun$prepare$1.apply(MLLibPredictionJob.scala:212)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.ProgressListener.push(ProgressListener.scala:46)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.MLLibPredictionJob$class.prepare(MLLibPredictionJob.scala:212)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.MLLibPredictionDoctorJob$.prepare(MLLibPredictionDoctorJob.scala:20)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.MLLibPredictionDoctorJob$delayedInit$body.apply(MLLibPredictionDoctorJob.scala:72)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at scala.Function0$class.apply$mcV$sp(Function0.scala:40)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.SuicidalApp$$anonfun$delayedInit$1.apply$mcV$sp(package.scala:402)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at scala.App$$anonfun$main$1.apply(App.scala:71)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at scala.App$$anonfun$main$1.apply(App.scala:71)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at scala.collection.immutable.List.foreach(List.scala:318)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:32)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at scala.App$class.main(App.scala:71)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.MLLibPredictionDoctorJob$.main(MLLibPredictionDoctorJob.scala:20)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at com.dataiku.dip.spark.MLLibPredictionDoctorJob.main(MLLibPredictionDoctorJob.scala)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at java.lang.reflect.Method.invoke(Method.java:497)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:710)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:181)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:206)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:121)
[2017/03/21-09:19:30.848] [Exec-282] [INFO] [dku.utils] - at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
What is the problem ?