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Root Cause Analysis

  1. java.lang.ClassCastException

    class StringArrayWritable

    at java.lang.Class.asSubclass()
  2. Java RT
    Class.asSubclass
    1. java.lang.Class.asSubclass(Class.java:3165)
    1 frame
  3. Hadoop
    YarnChild$2.run
    1. org.apache.hadoop.mapred.JobConf.getOutputKeyComparator(JobConf.java:892)
    2. org.apache.hadoop.mapred.MapTask$MapOutputBuffer.init(MapTask.java:1005)
    3. org.apache.hadoop.mapred.MapTask.createSortingCollector(MapTask.java:402)
    4. org.apache.hadoop.mapred.MapTask.access$100(MapTask.java:81)
    5. org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:698)
    6. org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:770)
    7. org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
    8. org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
    8 frames
  4. Java RT
    Subject.doAs
    1. java.security.AccessController.doPrivileged(Native Method)
    2. javax.security.auth.Subject.doAs(Subject.java:415)
    2 frames
  5. Hadoop
    UserGroupInformation.doAs
    1. org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671)
    1 frame
  6. Hadoop
    YarnChild.main
    1. org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
    1 frame