could not find implicit value for evidence parameter of type org.apache.flink.api.common.typeinfo.Ty

作者：木道寻08 | 2024-08-13 01:14:31

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could not find implicit value for evidence parameter of type org.apache.flin

scala helloword 报错：could not find implicit value for evidence parameter of type org.apache.flink.api.common.typeinfo.TypeInformation[(String, Int)]


import org.apache.flink.api.scala.{DataSet, ExecutionEnvironment}
import org.apache.flink.api.scala._
 
object DataSetWcApp {
  def main(a: Array[String]): Unit = {
    val env: ExecutionEnvironment = ExecutionEnvironment.getExecutionEnvironment
    val textDataSet: DataSet[String] =         
    env.readTextFile("C:\\Users\\gxk\\Desktop\\hello.txt")
    textDataSet.flatMap(_.split(" ")).map((_, 1)).groupBy(0).sum(1).print()
 
  }
}

解决隐式转换的包导入了就是报错

苦苦思索中..... 灵机一动

原来是因为本地安装的scala和程序中导入的scala jar包版本不一致导致的！真的棒槌！！！

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