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  • Spark aggregateByKey on Dataset
    via Stack Overflow by faustineinsun
    • java.lang.NullPointerException at org.apache.spark.sql.Dataset.schema(Dataset.scala:393) at org.apache.spark.sql.Dataset.toDF(Dataset.scala:339) at org.apache.spark.sql.Dataset.showString(Dataset.scala:239) at at at

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