thank you, it works
after my operation over p, return p.toIterator, because mapPartitions has
iterator return type, is that right?
rdd.mapPartitions{D => {val p = D.toArray; ...; p.toIterator}}-- View this message in context: http://apache-spark-user-list.1001560.n3.nabble.com/Only-TraversableOnce-tp3873p4043.html Sent from the Apache Spark User List mailing list archive at Nabble.com.
