Hi, When reading through ALS code, I find that:
class ALS private ( private var numUserBlocks: Int, private var numProductBlocks: Int, private var rank: Int, private var iterations: Int, private var lambda: Double, private var implicitPrefs: Boolean, private var alpha: Double, private var seed: Long = System.nanoTime() ) extends *Serializable *with Logging and why should ALS extend Serializable ? if not, there will be an Exception: task is not serializable, ALS is not serializable. I did not find any closure functions in which ALS is referenced. Any idea ? Thx. Hao -- View this message in context: http://apache-spark-user-list.1001560.n3.nabble.com/Why-is-ALS-class-serializable-tp19262.html Sent from the Apache Spark User List mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@spark.apache.org For additional commands, e-mail: user-h...@spark.apache.org