对象FlinkKafkaConsumer010不是package org.apache.flink.streaming.connectors.kafka的成员

Question

我正在尝试汇编一个小程序，以连接到卡夫卡主题使用apache flink。我需要使用FlinkKafkaConsumer010。

package uimp
import org.apache.flink.streaming.api.scala._
import org.apache.flink.streaming.api.TimeCharacteristic
import org.apache.flink.streaming.util.serialization.SimpleStringSchema
import org.apache.flink.streaming.connectors.kafka.{FlinkKafkaConsumer010}
import java.util.Properties

object Silocompro {
  def main(args: Array[String]): Unit = {
 // set up the execution environment
    val env = StreamExecutionEnvironment.getExecutionEnvironment
    env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime)

    val propertiesTopicDemographic = new Properties()
    propertiesTopicDemographic.setProperty("bootstrap.servers", "bigdata.dataspartan.com:19093")
    propertiesTopicDemographic.setProperty("group.id", "demographic")

    val myConsumerDemographic = new FlinkKafkaConsumer010[String]("topic_demographic", new 
    SimpleStringSchema(), propertiesTopicDemographic)

    val messageStreamDemographic = env
      .addSource(myConsumerDemographic)
      .print()


    env.execute("Flink Scala API Skeleton")

   }
 }

我的问题是，当试图用这个包汇编我的程序时，编译器返回一个错误“build.sbt FlinkKafkaConsumer010不是包org.apache.flink.streaming.connectors.kafka的成员”：

      ThisBuild / resolvers ++= Seq("Apache Development Snapshot Repository" at 
      "https://repository.apache.org/content/repositories/snapshots/",Resolver.mavenLocal)

      name := "silocompro"

      version := "1.0"

      organization := "uimp"

      ThisBuild / scalaVersion := "2.12.11"

      val flinkVersion = "1.9.0"

      val flinkDependencies = Seq(
         "org.apache.flink" %% "flink-scala" % flinkVersion % "provided",
         "org.apache.flink" %% "flink-streaming-scala" % flinkVersion % "provided",
         "org.apache.flink" %% "flink-core"% flinkVersion % "provided",
         "org.apache.flink" %% "flink-connector-kafka-base" % flinkVersion % "provided",
         "org.apache.flink" %% "flink-clients" % flinkVersion % "provided",
         "org.apache.flink" %% "flink-connector-kafka" % flinkVersion % "provided")

      lazy val root = (project in file(".")).
      settings( libraryDependencies ++= flinkDependencies)


      assembly / mainClass := Some("uimp.Silocompro")

      Compile / run  := Defaults.runTask(Compile / fullClasspath,
                               Compile / run / mainClass,
                               Compile / run / runner
                              ).evaluated

 
      Compile / run / fork := true
      Global / cancelable := true

      assembly / assemblyOption  := (assembly / assemblyOption).value.copy(includeScala = false)

这个依赖错误的原因是什么？

Answer 1

连接器不是flink-binary的一部分，这意味着您需要在compile作用域中具有连接器，因此这基本上意味着您需要从这些依赖项中删除provided。在此设置中，应用程序将在集群上运行。

但是，如果你想在不启动集群的情况下在本地运行它，那么你应该在compile作用域中拥有所有的provided依赖项，即删除所有flink作用域声明。

Answer 2

最后，我遇到了依赖关系的问题。我做了一些动作：

1. 我已经添加了一个新的解析器https:/oss.sonatype.org/content/repositories
2. 我已经从VS Code
3. 卸载了插件金属(Scala)我已经添加了“org.apache.flink”%% "flink-connector-kafka-0.10"%flinkVersion - tomy

在这些操作之后，我解决了我的库依赖问题。谢谢