java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected at > org.apache.mahout.common.HadoopUtil.getCustomJobName(HadoopUtil.java:166)

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    Root Cause Analysis

    1. java.lang.IncompatibleClassChangeError

      Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected at > org.apache.mahout.common.HadoopUtil.getCustomJobName(HadoopUtil.java:166)

      at org.apache.mahout.common.AbstractJob.prepareJob()
    2. Mahout Math
      AbstractJob.prepareJob
      1. org.apache.mahout.common.AbstractJob.prepareJob(AbstractJob.java:553)
      1 frame