java.lang.RuntimeException: java.lang.NoSuchMethodException: hadoopSite.WordCount$Map.<init>()

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Root Cause Analysis

  1. java.lang.NoSuchMethodException

    hadoopSite.WordCount$Map.<init>()

    at java.lang.Class.getConstructor0()
  2. Java RT
    Class.getDeclaredConstructor
    1. java.lang.Class.getConstructor0(Class.java:2706)
    2. java.lang.Class.getDeclaredConstructor(Class.java:1985)
    2 frames
  3. Hadoop
    ReflectionUtils.newInstance
    1. org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:109)
    1 frame
  4. Hadoop
    Child.main
    1. org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:569)
    2. org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
    3. org.apache.hadoop.mapred.Child.main(Child.java:170)
    3 frames