Я новичок в scala и хочу загрузить файл csv. Пожалуйста, найдите мой код ниже;
package rddbasics
import org.apache.spark.sql.SparkSession
object RddWithCsvFile {
def main(args: Array[String]): Unit = {
val spark = SparkSession.builder()
.appName("Creating Rdd with CSV")
.master("local")
.getOrCreate()
val csvRdd = spark.sparkContext.textFile("C:\\data\\hr_db\\employees\\part-00000.csv")
println(csvRdd.count)
}
}
Maven может создать класс, но при запуске выдает исключение ниже
Error:scalac: Error while emitting RddWithCsvFile.scala
assertion failed:
Bad superClass for class Nothing$: <none>
while compiling: C:\Documents\POC\scala\spark-maven-1\src\main\scala\rddbasics\RddWithCsvFile.scala
during phase: jvm
library version: version 2.13.3
compiler version: version 2.13.3
reconstructed args: -classpath C:\Program Files\Java\jdk1.8.0_221\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_221\jre\lib\jce.jar;C:\Program 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last tree to typer: Select(Ident(csvRdd), count)
tree position: line 14 of C:\Documents\POC\scala\spark-maven-1\src\main\scala\rddbasics\RddWithCsvFile.scala
tree tpe: (): Long
symbol: method count in class RDD
symbol definition: def count(): Long (a MethodSymbol)
symbol package: org.apache.spark.rdd
symbol owners: method count -> class RDD
call site: constructor RddWithCsvFile in object RddWithCsvFile in package rddbasics
== Source file context for tree position ==
11
12 val csvRdd = spark.sparkContext.textFile("C:\\data\\hr_db\\employees\\part-00000.csv")
13
14 println(csvRdd.count)
15 }
16 }
17
Я не могу понять проблему, пожалуйста помощь