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scala/Product$class
java.lang.NoClassDefFoundError: scala/Product$class	at org.apache.spark.SparkConf$DeprecatedConfig.(SparkConf.scala:762)	at org.apache.spark.SparkConf$.(SparkConf.scala:615)	at org.apache.spark.SparkConf$.(SparkConf.scala)	at org.apache.spark.SparkConf.set(SparkConf.scala:84)	at org.apache.spark.SparkConf.set(SparkConf.scala:73)	at org.apache.spark.SparkConf.setMaster(SparkConf.scala:105)