scala如何在任意方法中打印当前线程栈信息(StackTrace)

1.以wordcount为例

package org.apache.spark.examples

import org.apache.spark.{SparkConf, SparkContext}
//在任意方法中打印当前线程栈信息(StackTrace)
object word1 {
  def printStackTrace(cls: Class[_]): Unit = {
    val elements = (new Throwable).getStackTrace
    System.out.println("Stack for " + cls.getName + ":")
    for(i <-  to elements.length) {
      System.out.println(elements(i).getClassName +
        "." + elements(i).getMethodName +
        "(" + elements(i).getFileName +
        ":" + elements(i).getLineNumber +
        ")")
      }
    }
  def main(args:Array[String]): Unit ={
    val sparkConf=new SparkConf().setAppName("WORD1").setMaster("local")
    val sc=new SparkContext(sparkConf)
    val lines=sc.textFile("E:\\spark_file\\wordcount.txt")
    val word=lines.flatMap{x =>x.split(" ")}
    val pairs=word.map(s =>(s,))
    val wordcnt=pairs.reduceByKey{_+_}
    wordcnt.foreach(wordcount =>println(wordcount._1+" appread "+wordcount._2+" times/time "))
    printStackTrace(classOf[Test])
  }
}

2.输出结果：