java.lang.ClassNotFoundException: org.apache.hama.algebra.AdditionReduce at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:633) at org.apache.hadoop.mapred.JobConf.getReducerClass(JobConf.java:747)

markmail.org | 8 months ago
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    Re: [Q] Error in executing an example (Matrix Addition) - Edward J. Yoon - org.apache.incubator.hama-user - MarkMail

    markmail.org | 8 months ago
    java.lang.ClassNotFoundException: org.apache.hama.algebra.AdditionReduce at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:633) at org.apache.hadoop.mapred.JobConf.getReducerClass(JobConf.java:747)

    Root Cause Analysis

    1. java.lang.ClassNotFoundException

      org.apache.hama.algebra.AdditionReduce at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:633) at org.apache.hadoop.mapred.JobConf.getReducerClass(JobConf.java:747)

      at org.apache.hadoop.mapred.ReduceTask.run()
    2. Hadoop
      ReduceTask.run
      1. org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:318)
      1 frame