NoClassDefFoundError:scala/Product $ class [英] NoClassDefFoundError: scala/Product$class
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问题描述
我是Scala的新手,我正在尝试使用Scala和Java创建一个混合项目. 但是,当我运行测试代码时,我遇到了一些问题.运行测试时,出现错误
I am new to scala and I am trying to create a mixed project with Scala and Java. However I am facing some issues when I run the test code. When I run the test, I am getting an error
和我的pom.xml如下:
and my pom.xml as follows:
<properties>
<scala.version>2.12.2</scala.version>
</properties>
<dependencies>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>${scala.version}</version>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-compiler</artifactId>
<version>${scala.version}</version>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-reflect</artifactId>
<version>${scala.version}</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming_2.11</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming-kafka-0-10_2.11</artifactId>
<version>2.1.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<version>2.15.2</version>
<executions>
<execution>
<id>compile</id>
<goals>
<goal>compile</goal>
</goals>
<phase>compile</phase>
</execution>
<execution>
<id>test-compile</id>
<goals>
<goal>testCompile</goal>
</goals>
<phase>test-compile</phase>
</execution>
<execution>
<phase>process-resources</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>
我的代码如下:
class BptConsumer {
def consumeLogevent(): Unit ={
val conf = new SparkConf().setMaster("local[2]").setAppName("PVStatistics");
val ssc = new StreamingContext(conf,Seconds(5));
val kafkaParams = Map[String, Object](
"bootstrap.servers" -> "172.20.13.196:9092",
"key.deserializer" -> classOf[StringDeserializer],
"value.deserializer" -> classOf[StringDeserializer],
"group.id" -> "1",
"auto.offset.reset" -> "latest",
"enable.auto.commit" -> (false: java.lang.Boolean)
)
val topics = Array("fd-blogs-tst")
val stream = KafkaUtils.createDirectStream[String, String](
ssc,
PreferConsistent,
Subscribe[String, String](topics, kafkaParams)
)
/*val rdd = stream.transform(x=>RDD[String]);*/
val lines = stream.map(record => (record.key,record.value))
lines.print();
ssc.start();
ssc.awaitTermination();
}
}
有人可以帮助我找到问题吗?
Could someone help me out in finding the issue?
推荐答案
您正在将Scala 2.12.2与由Scala 2.11构建的Spark库一起使用.将您的Scala版本更改为2.11版本:
You're using Scala 2.12.2 with Spark libraries that are built with Scala 2.11. Change your Scala version to a 2.11 release:
<properties>
<scala.version>2.11.11</scala.version>
</properties>
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