scala – value reduceByKey不是org.apache.spark.rdd.RDD的成员

import org.apache.spark.SparkContext._
import com.mufu.wcsa.component.dimension.{DimensionKey,KeyTrait}
import com.mufu.wcsa.log.LogRecord
import org.apache.spark.rdd.RDD

object PV {

//
  def stat[C <: LogRecord,K <:DimensionKey](statTrait: KeyTrait[C,K],logRecords: RDD[C]): RDD[(K,Int)] = {
    val t = logRecords.map(record =>(statTrait.getKey(record),1)).reduceByKey((x,y) => x + y)

我收到了这个错误

at 1502387780429
[ERROR] /Users/lemanli/work/project/newcma/wcsa/wcsa_my/wcsavistor/src/main/scala/com/mufu/wcsa/component/stat/PV.scala:25: error: value reduceByKey is not a member of org.apache.spark.rdd.RDD[(K,Int)]
[ERROR]     val t = logRecords.map(record =>(statTrait.getKey(record),y) => x + y)

定义了一个特征

trait KeyTrait[C <: LogRecord,K <: DimensionKey]{
  def getKey(c:C):K
}

It is compiled,Thanks.

def stat[C <: LogRecord,K <:DimensionKey : ClassTag : Ordering](statTrait: KeyTrait[C,y) => x + y)

关键需要覆盖Ordering [T].

object ClientStat extends KeyTrait[DetailLogRecord,ClientStat] {
      implicit val c

lientStatSorting = new Ordering[ClientStat] {
    override def compare(x: ClientStat,y: ClientStat): Int = x.key.compare(y.key)
  }

      def getKey(detailLogRecord: DetailLogRecord): ClientStat = new ClientStat(detailLogRecord)
    }