java.lang.ClassCastException: org.formcept.wisdom.RFMCKey cannot be cast to java.lang.Comparable at org.spark-project.guava.collect.NaturalOrdering.compare(NaturalOrdering.java:28)

Stack Overflow | Punit Naik | 9 months ago
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    Google Groups | 9 months ago | Punit Naik
    java.lang.ClassCastException: org.formcept.wisdom.RFMCKey cannot be cast to java.lang.Comparable at org.spark-project.guava.collect.NaturalOrdering.compare(NaturalOrdering.java:28)
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    Root Cause Analysis

    1. java.lang.ClassCastException

      org.formcept.wisdom.RFMCKey cannot be cast to java.lang.Comparable at org.spark-project.guava.collect.NaturalOrdering.compare(NaturalOrdering.java:28)

      at scala.math.LowPriorityOrderingImplicits$$anon$7.compare()
    2. Scala
      LowPriorityOrderingImplicits$$anon$7.compare
      1. scala.math.LowPriorityOrderingImplicits$$anon$7.compare(Ordering.scala:153)
      1 frame
    3. Spark
      Executor$TaskRunner.run
      1. org.apache.spark.util.collection.ExternalSorter$$anon$8.compare(ExternalSorter.scala:170)
      2. org.apache.spark.util.collection.ExternalSorter$$anon$8.compare(ExternalSorter.scala:164)
      3. org.apache.spark.util.collection.TimSort.countRunAndMakeAscending(TimSort.java:252)
      4. org.apache.spark.util.collection.TimSort.sort(TimSort.java:110)
      5. org.apache.spark.util.collection.Sorter.sort(Sorter.scala:37)
      6. org.apache.spark.util.collection.SizeTrackingPairBuffer.destructiveSortedIterator(SizeTrackingPairBuffer.scala:83)
      7. org.apache.spark.util.collection.ExternalSorter.partitionedIterator(ExternalSorter.scala:687)
      8. org.apache.spark.util.collection.ExternalSorter.iterator(ExternalSorter.scala:705)
      9. org.apache.spark.shuffle.hash.HashShuffleReader.read(HashShuffleReader.scala:64)
      10. org.apache.spark.rdd.ShuffledRDD.compute(ShuffledRDD.scala:92)
      11. org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:277)
      12. org.apache.spark.CacheManager.getOrCompute(CacheManager.scala:70)
      13. org.apache.spark.rdd.RDD.iterator(RDD.scala:242)
      14. org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
      15. org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:277)
      16. org.apache.spark.rdd.RDD.iterator(RDD.scala:244)
      17. org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:61)
      18. org.apache.spark.scheduler.Task.run(Task.scala:64)
      19. org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:203)
      19 frames
    4. Java RT
      Thread.run
      1. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      3. java.lang.Thread.run(Thread.java:745)
      3 frames