spark scala遇到一個隻能用foreach不能用map的問題

檔案中資料格式：1^A1002^A1522718982.606^time_local=03/Apr/2018:09:29:42 +0800&http_referer=-&http_user_agent=Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36&-=master1^A/do?t=99b61873a98742a3a29a4a6d64bc043f&en=pv&ct=1521163377&v=1&pl=pc

源代碼：

import org.apache.spark._
object LogTransfer {

  def transfer(args: Array[String]): Unit = {
    val sparkConf = new SparkConf().setAppName("LogTransfer").setMaster("local")
    val sc = new SparkContext(sparkConf)
    val logFile = sc.textFile(args(0))

    val logLines = logFile.map(line => line.split("""\^A/do\?|\^A"""))
//    logLines.first.foreach(println)
//    此處無法隻能用foreach，不能用map,為什麼？？？？？？？？
    logLines.foreach(log =>{
      println("---------------------------------")
      log.foreach(println)
//      業務資料代碼......
    })
    sc.stop()
  }

  def main(args: Array[String]): Unit = {
      

//    args傳入檔案路徑
  transfer(args)      

}}