Create a RDD : too many fields => use case class for RDD - scala

Question

I have a dataset of intrusion which is labeled that I want to use to test different supervised machine learning techniques.
So here is a part of my code :
object parser_dataset {
val conf = new SparkConf()
.setMaster("local[2]")
.setAppName("kdd")
.set("spark.executor.memory", "8g")
conf.registerKryoClasses(Array(
classOf[Array[Any]],
classOf[Array[scala.Tuple3[Int, Int, Int]]],
classOf[String],
classOf[Any]
))
val context = new SparkContext(conf)
def load(file: String): RDD[(Int, String, String,String,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Int,Double,Double,Double,Double,Double,Double,Double, Int, Int,Double, Double, Double, Double, Double, Double, Double, Double, String)] = {
val data = context.textFile(file)
val res = data.map(x => {
val s = x.split(",")
(s(0).toInt, s(1), s(2), s(3), s(4).toInt, s(5).toInt, s(6).toInt, s(7).toInt, s(8).toInt, s(9).toInt, s(10).toInt, s(11).toInt, s(12).toInt, s(13).toInt, s(14).toInt, s(15).toInt, s(16).toInt, s(17).toInt, s(18).toInt, s(19).toInt, s(20).toInt, s(21).toInt, s(22).toInt, s(23).toInt, s(24).toDouble, s(25).toDouble, s(26).toDouble, s(27).toDouble, s(28).toDouble, s(29).toDouble, s(30).toDouble, s(31).toInt, s(32).toInt, s(33).toDouble, s(34).toDouble, s(35).toDouble, s(36).toDouble, s(37).toDouble, s(38).toDouble, s(39).toDouble, s(40).toDouble, s(41))
})
.persist(StorageLevel.MEMORY_AND_DISK)
return res
}
def main(args: Array[String]) {
val data = this.load("/home/hvfd8529/Datasets/KDDCup99/kddcup.data_10_percent_corrected")
data1.collect.foreach(println)
data.distinct()
}
}
This is not my code, it was given to me and I just modified some parts (especially the RDD and splitting parts) and I'm a newbie at Scala and Spark :)
EDIT:
So I added case class above my load function, like this :
case class BasicFeatures(duration:Int, protocol_type:String, service:String, flag:String, src_bytes:Int, dst_bytes:Int, land:Int, wrong_fragment:Int, urgent:Int)
case class ContentFeatures(hot:Int, num_failed_logins:Int, logged_in:Int, num_compromised:Int, root_shell:Int, su_attempted:Int, num_root:Int, num_file_creations:Int, num_shells:Int, num_access_files:Int, num_outbound_cmds:Int, is_host_login:Int, is_guest_login:Int)
case class TrafficFeatures(count:Int, srv_count:Int, serror_rate:Double, srv_error_rate:Double, rerror_rate:Double, srv_rerror_rate:Double, same_srv_rate:Double, diff_srv_rate:Double, srv_diff_host_rate:Double, dst_host_count:Int, dst_host_srv_count:Int, dst_host_same_srv_rate:Double, dst_host_diff_srv_rate:Double, dst_host_same_src_port_rate:Double, dst_host_srv_diff_host_rate:Double, dst_host_serror_rate:Double, dst_host_srv_serror_rate:Double, dst_host_rerror_rate:Double, dst_host_srv_rerror_rate:Double, attack_type:String )
But now I am confused, how can I use these to solve my problem, because I still need a RDD in order to have one feature = one field
Here is my one line of my file I want to parse :
0,tcp,ftp_data,SF,491,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,0.00,0.00,0.00,0.00,1.00,0.00,0.00,150,25,0.17,0.03,0.17,0.00,0.00,0.00,0.05,0.00,normal,20

Answer 1

Max tuple size supported by Scala is 22.Scala function have limit of 22 Parameter. Hence you can not create tuple of size more that 22.