I expected the code below to print "hello" for each partition, and "world" for each record. But when I ran it the code ran but had no print outs of any kind. No errors either. What is happening here?

%scala
 
val rdd = spark.sparkContext.parallelize(Seq(1,2,3,4,5,6,7,8))
rdd.foreachPartition(partition => {
 println("hello")
 partition.foreach(fun=>{
   println("world")
 })
})