我正在使用maven
我添加了以下依赖项
<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>
我还在代码中添加了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));
它可以很好地解决任何错误,当我通过spark-submit运行时,我收到以下错误,非常感谢任何帮助 . 谢谢你的时间 .
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,位于KafkaSparkStreamingTest(KafkaSparkStreaming.java:40),位于sun.reflect的KafkaSparkStreaming.main(KafkaSparkStreaming.java:23) at.MativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method .java:606)在org.apache的org.apache.spark.deploy.SparkSubmit $ .launch(SparkSubmit.scala:303)org.apache.spark.deploy.SparkSubmit $ .main(SparkSubmit.scala:55) . spark.deploy.SparkSubmit.main(SparkSubmit.scala)引起:java.lang.ClassNotFoundException:java.net.URLClassLoader $ 1.run中的org.apache.spark.streaming.kafka.KafkaUtils(URLClassLoader.java:366)
2 回答
我遇到了同样的问题,我通过构建带依赖关系的jar来解决它 .
在代码中删除“sc.addJar()” .
将以下代码添加到pom.xml
mvn包
提交“example-jar-with-dependencies.jar”
为了将来参考,如果你得到一个ClassNotFoundException,如果你搜索“org.apache.spark ...”,你将被带到maven页面,它将告诉你你的pom文件中缺少的依赖关系 . 它还会为您提供放入pom文件的代码 .