Spark Kafka 流问题

问题描述

我正在使用 maven

我添加了以下依赖

 <!-- Spark 依赖--><groupId>org.apache.spark</groupId><artifactId>spark-streaming_2.10</artifactId><version>1.1.0</version></依赖><依赖><!-- Spark 依赖--><groupId>org.apache.spark</groupId><artifactId>spark-streaming-kafka_2.10</artifactId><version>1.1.0</version></依赖>

我也在代码中添加了jar

SparkConf sparkConf = new SparkConf().setAppName("KafkaSparkTest");JavaSparkContext sc = new JavaSparkContext(sparkConf);sc.addJar("/home/test/.m2/repository/org/apache/spark/spark-streaming-kafka_2.10/1.0.2/spark-streaming-kafka_2.10-1.0.2.jar");JavaStreamingContext jssc = new JavaStreamingContext(sc, new Duration(5000));

它很好，没有任何错误，当我运行 spark-submit 时出现以下错误，非常感谢任何帮助.感谢您抽出宝贵时间.

bin/spark-submit --class "KafkaSparkStreaming" --master local[4] try/simple-project/target/simple-project-1.0.jar

线程main"中的异常 java.lang.NoClassDefFoundError: org/apache/spark/streaming/kafka/KafkaUtils在 KafkaSparkStreaming.sparkStreamingTest(KafkaSparkStreaming.java:40)在 KafkaSparkStreaming.main(KafkaSparkStreaming.java:23)在 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)在 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)在 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)在 java.lang.reflect.Method.invoke(Method.java:606)在 org.apache.spark.deploy.SparkSubmit$.launch(SparkSubmit.scala:303)在 org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:55)在 org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)引起:java.lang.ClassNotFoundException:org.apache.spark.streaming.kafka.KafkaUtils在 java.net.URLClassLoader$1.run(URLClassLoader.java:366)

解决方案

我遇到了同样的问题，我通过构建带有依赖项的 jar 解决了它.

1. 删除代码中的sc.addJar()".

2. 将下面的代码添加到 pom.xml

   <sourceDirectory>src/main/java</sourceDirectory><testSourceDirectory>src/test/java</testSourceDirectory><!--将 maven-assembly-plugin 绑定到 package 阶段这将创建一个没有风暴依赖项的 jar 文件适合部署到集群.--><artifactId>maven-assembly-plugin</artifactId><配置><descriptorRef>jar-with-dependencies</descriptorRef></descriptorRefs><存档><清单><mainClass></mainClass></清单></存档></配置><执行><id>make-assembly</id><phase>包</phase><目标><目标>单</目标></目标></执行></执行></插件></plugins></build>

3. mvn 包

4. 提交example-jar-with-dependencies.jar"

I am using maven

i have added the following dependencies

   <dependency> <!-- Spark dependency -->
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-streaming_2.10</artifactId>
      <version>1.1.0</version>
    </dependency>   <dependency> <!-- Spark dependency -->
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-streaming-kafka_2.10</artifactId>
      <version>1.1.0</version>
    </dependency>

I have also added the jar in the code

SparkConf sparkConf = new SparkConf().setAppName("KafkaSparkTest");
JavaSparkContext sc = new JavaSparkContext(sparkConf);
sc.addJar("/home/test/.m2/repository/org/apache/spark/spark-streaming-kafka_2.10/1.0.2/spark-streaming-kafka_2.10-1.0.2.jar");
JavaStreamingContext jssc = new JavaStreamingContext(sc, new Duration(5000));

It comples fine with out any error , i am getting the following error when i run through spark-submit, any help is much appreciated. Thanks for your time.

bin/spark-submit --class "KafkaSparkStreaming" --master local[4] try/simple-project/target/simple-project-1.0.jar

解决方案

I meet the same problem, I solved it by build the jar with dependencies.

1. remove "sc.addJar()" in your code.

2. add the code below to pom.xml

   <build>
       <sourceDirectory>src/main/java</sourceDirectory>
       <testSourceDirectory>src/test/java</testSourceDirectory>
       <plugins>
         <!--
                      Bind the maven-assembly-plugin to the package phase
           this will create a jar file without the storm dependencies
           suitable for deployment to a cluster.
          -->
         <plugin>
           <artifactId>maven-assembly-plugin</artifactId>
           <configuration>
             <descriptorRefs>
               <descriptorRef>jar-with-dependencies</descriptorRef>
             </descriptorRefs>
             <archive>
               <manifest>
                 <mainClass></mainClass>
               </manifest>
             </archive>
           </configuration>
           <executions>
             <execution>
               <id>make-assembly</id>
               <phase>package</phase>
               <goals>
                 <goal>single</goal>
               </goals>
             </execution>
           </executions>
         </plugin>
       </plugins>
   </build>
   

3. mvn package

4. submit the "example-jar-with-dependencies.jar"

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