Spark error "value join is not a member of org.apache.spark.rdd.RDD[((String, String), String, String)]"

[amit tewari]

Hi Dear Spark Users

I am very new to Spark/Scala.

Am using Datastax (4.7/Spark 1.2.1) and struggling with following
error/issue.

Already tried options like import org.apache.spark.SparkContext._ or
explicit import org.apache.spark.SparkContext.rddToPairRDDFunctions.
But error not resolved.

Help much appreciated.

Thanks
AT

scala>val input1 = sc.textFile("/test7").map(line =>
line.split(",").map(_.trim));
scala>val input2 = sc.textFile("/test8").map(line =>
line.split(",").map(_.trim));
scala>val input11 = input1.map(x=>((x(0),x(1)),x(2),x(3)))
scala>val input22 = input2.map(x=>((x(0),x(1)),x(2),x(3)))

 scala> input11.join(input22).take(10)

<console>:66: error: value join is not a member of
org.apache.spark.rdd.RDD[((String, String), String, String)]

              input11.join(input22).take(10)