Spark Kafka Streaming Issue

Question

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

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/streaming/kafka/KafkaUtils at KafkaSparkStreaming.sparkStreamingTest(KafkaSparkStreaming.java:40) at KafkaSparkStreaming.main(KafkaSparkStreaming.java:23) at sun.reflect.NativeMethodAccessorImpl.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) at org.apache.spark.deploy.SparkSubmit$.launch(SparkSubmit.scala:303) at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:55) at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) Caused by: java.lang.ClassNotFoundException: org.apache.spark.streaming.kafka.KafkaUtils at java.net.URLClassLoader$1.run(URLClassLoader.java:366)

Your addJar method is not neccesary. However, you should add maven assembly plugin and package in a .jar with dependencies included (Do not find spark-kafka dependency). — gasparms
i have added spark-streaming-kafka_2.10 in the dependancy list in pom — mithra

secfree secfree · Accepted Answer · 2014-10-21T06:42:25

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

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

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>

mvn package
submit the "example-jar-with-dependencies.jar"

Spark Kafka Streaming Issue

2 Answers