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via Stack Overflow by MichaelDD
, 2 years ago
via Stack Overflow by maher
, 5 months ago
via GitHub by car2008
, 1 year ago
java.lang.UnsupportedOperationException: empty collection	at org.apache.spark.rdd.RDD$$anonfun$first$1.apply(RDD.scala:1318)	at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:147)	at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:108)	at org.apache.spark.rdd.RDD.withScope(RDD.scala:310)	at org.apache.spark.rdd.RDD.first(RDD.scala:1315)	at org.apache.spark.mllib.recommendation.MatrixFactorizationModel.validateFeatures(MatrixFactorizationModel.scala:67)	at org.apache.spark.mllib.recommendation.MatrixFactorizationModel.(MatrixFactorizationModel.scala:62)	at org.apache.spark.mllib.recommendation.ALS.run(ALS.scala:266)	at org.apache.spark.mllib.recommendation.ALS$.train(ALS.scala:328)	at org.apache.spark.mllib.recommendation.ALS$.train(ALS.scala:346)