io.prediction.data.storage.DataMapException: The required field phrase cannot be null.

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    io.prediction.data.storage.DataMapException: The field title is required.
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    Root Cause Analysis

    1. io.prediction.data.storage.DataMapException

      The required field phrase cannot be null.

      at io.prediction.data.storage.DataMap.get()
    2. io.prediction.data
      DataMap.get
      1. io.prediction.data.storage.DataMap.get(DataMap.scala:74)
      1 frame
    3. io.prediction.classifier
      DataSource$$anonfun$readTraining$1.apply
      1. io.prediction.classifier.DataSource$$anonfun$readTraining$1.apply(DataSource.scala:21)
      2. io.prediction.classifier.DataSource$$anonfun$readTraining$1.apply(DataSource.scala:19)
      2 frames
    4. Scala
      ArrayOps$ofRef.foreach
      1. scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
      2. scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
      2 frames
    5. io.prediction.classifier
      DataSource.readTraining
      1. io.prediction.classifier.DataSource.readTraining(DataSource.scala:19)
      2. io.prediction.classifier.DataSource.readTraining(DataSource.scala:8)
      2 frames
    6. io.prediction.controller
      Engine.train
      1. io.prediction.controller.PDataSource.readTrainingBase(PDataSource.scala:38)
      2. io.prediction.controller.Engine$.train(Engine.scala:602)
      3. io.prediction.controller.Engine.train(Engine.scala:152)
      3 frames
    7. io.prediction.workflow
      CreateWorkflow.main
      1. io.prediction.workflow.CoreWorkflow$.runTrain(CoreWorkflow.scala:60)
      2. io.prediction.workflow.CreateWorkflow$.main(CreateWorkflow.scala:257)
      3. io.prediction.workflow.CreateWorkflow.main(CreateWorkflow.scala)
      3 frames
    8. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      4. java.lang.reflect.Method.invoke(Method.java:483)
      4 frames
    9. Spark
      SparkSubmit.main
      1. org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:569)
      2. org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:166)
      3. org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:189)
      4. org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:110)
      5. org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
      5 frames