reduceByKey method not being found in Scala Spark

Question

Attempting to run http://spark.apache.org/docs/latest/quick-start.html#a-standalone-app-in-scala from source.

This line:

Answer 1

If you use maven on ScalaIDE I just solved the problem by updating the dependency from spark-streaming version 1.2 to version 1.3.

Answer 2

Actually, you can find it in PairRDDFunctions class. PairRDDFunctions is a class contains extra functions available on RDDs of (key, value) pairs through an implicit conversion.

https://spark.apache.org/docs/2.1.0/api/scala/index.html#org.apache.spark.rdd.PairRDDFunctions

Answer 3

You should import the implicit conversions from SparkContext:

import org.apache.spark.SparkContext._

They use the 'pimp up my library' pattern to add methods to RDD's of specific types. If curious, see SparkContext:1296