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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.init()
    2. Hadoop
      MapTask.createSortingCollector
      1. org.apache.hadoop.mapred.MapTask$MapOutputBuffer.init(MapTask.java:1012)
      2. org.apache.hadoop.mapred.MapTask.createSortingCollector(MapTask.java:402)
      2 frames