java.lang.RuntimeException: java.lang.ClassNotFoundException: test.WordMapper

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    Root Cause Analysis

    1. java.lang.RuntimeException

      java.lang.ClassNotFoundException: test.WordMapper

      at org.apache.hadoop.conf.Configuration.getClass()
    2. Hadoop
      Configuration.getClass
      1. org.apache.hadoop.conf.Configuration.getClass(Configuration.java:857)
      1 frame