KafkaUtils class not found in Spark streaming

Question

I have just began with Spark Streaming and I am trying to build a sample application that counts words from a Kafka stream. Although it compiles with sbt package, when I run it, I get NoClassDefFoundError. This post seems to have the same problem, but the solution is for Maven and I have not been able to reproduce it with sbt.

KafkaApp.scala:

import org.apache.spark._
import org.apache.spark.streaming._
import org.apache.spark.streaming.kafka._

object KafkaApp {
  def main(args: Array[String]) {

    val conf = new SparkConf().setAppName("kafkaApp").setMaster("local[*]")
    val ssc = new StreamingContext(conf, Seconds(1))
    val kafkaParams = Map(
        "zookeeper.connect" -> "localhost:2181",
        "zookeeper.connection.timeout.ms" -> "10000",
        "group.id" -> "sparkGroup"
    )

    val topics = Map(
        "test" -> 1
    )

    // stream of (topic, ImpressionLog)
    val messages = KafkaUtils.createStream(ssc, kafkaParams, topics, storage.StorageLevel.MEMORY_AND_DISK)
    println(s"Number of words: %{messages.count()}")
  }
}

build.sbt:

name := "Simple Project"

version := "1.1"

scalaVersion := "2.10.4"

libraryDependencies ++= Seq(
    "org.apache.spark" %% "spark-core" % "1.1.1",
    "org.apache.spark" %% "spark-streaming" % "1.1.1",
    "org.apache.spark" %% "spark-streaming-kafka" % "1.1.1"
)

resolvers += "Akka Repository" at "http://repo.akka.io/releases/"

And I submit it with:

bin/spark-submit \
  --class "KafkaApp" \
  --master local[4] \
  target/scala-2.10/simple-project_2.10-1.1.jar

Error:

14/12/30 19:44:57 INFO AkkaUtils: Connecting to HeartbeatReceiver: akka.tcp://sparkDriver@192.168.5.252:65077/user/HeartbeatReceiver
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/streaming/kafka/KafkaUtils$
    at KafkaApp$.main(KafkaApp.scala:28)
    at KafkaApp.main(KafkaApp.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.spark.deploy.SparkSubmit$.launch(SparkSubmit.scala:329)
    at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:75)
    at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.lang.ClassNotFoundException: org.apache.spark.streaming.kafka.KafkaUtils$
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

Answer 1

Following build.sbt worked for me. It requires you to also put the sbt-assembly plugin in a file under the projects/ directory.

build.sbt

name := "NetworkStreaming" // https://github.com/sbt/sbt-assembly/blob/master/Migration.md#upgrading-with-bare-buildsbt

libraryDependencies ++= Seq(
  "org.apache.spark" % "spark-streaming_2.10" % "1.4.1",
  "org.apache.spark" % "spark-streaming-kafka_2.10" % "1.4.1",         // kafka
  "org.apache.hbase" % "hbase" % "0.92.1",
  "org.apache.hadoop" % "hadoop-core" % "1.0.2",
  "org.apache.spark" % "spark-mllib_2.10" % "1.3.0"
)

mergeStrategy in assembly := {
  case m if m.toLowerCase.endsWith("manifest.mf")          => MergeStrategy.discard
  case m if m.toLowerCase.matches("meta-inf.*\\.sf$")      => MergeStrategy.discard
  case "log4j.properties"                                  => MergeStrategy.discard
  case m if m.toLowerCase.startsWith("meta-inf/services/") => MergeStrategy.filterDistinctLines
  case "reference.conf"                                    => MergeStrategy.concat
  case _                                                   => MergeStrategy.first
}

project/plugins.sbt

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.1")

Answer 2

Added the Dependency externally, project-->properties--> java Build Path-->Libraries--> add External jars and add the required jar.

this solved my issue.

Answer 3

Please try by including all dependency jars while submitting application:

./spark-submit --name "SampleApp" --deploy-mode client--master spark://host:7077 --class com.stackexchange.SampleApp --jars $SPARK_INSTALL_DIR/spark-streaming-kafka_2.10-1.3.0.jar,$KAFKA_INSTALL_DIR/libs/kafka_2.10-0.8.2.0.jar,$KAFKA_INSTALL_DIR/libs/metrics-core-2.2.0.jar,$KAFKA_INSTALL_DIR/libs/zkclient-0.3.jar spark-example-1.0-SNAPSHOT.jar

Answer 4

import org.apache.spark.streaming.kafka.KafkaUtils

use the below in build.sbt

---

name := "kafka"

version := "0.1"

scalaVersion := "2.11.12"

retrieveManaged := true

fork := true

//libraryDependencies += "org.apache.spark" % "spark-streaming_2.11" % "2.2.0"
//libraryDependencies += "org.apache.spark" % "spark-streaming-kafka-0-8_2.11" % "2.1.0"

libraryDependencies += "org.apache.spark" %% "spark-core" % "2.2.0"

//libraryDependencies += "org.apache.spark" %% "spark-sql" % "2.2.0"

libraryDependencies += "org.apache.spark" %% "spark-streaming" % "2.2.0"

// https://mvnrepository.com/artifact/org.apache.spark/spark-streaming-kafka-0-8
libraryDependencies += "org.apache.spark" %% "spark-streaming-kafka-0-8" % "2.2.0" % "provided"

// https://mvnrepository.com/artifact/org.apache.spark/spark-streaming-kafka-0-8-assembly
libraryDependencies += "org.apache.spark" %% "spark-streaming-kafka-0-8-assembly" % "2.2.0"

This will fix the issue

Answer 5

Using Spark 1.6 do the job for me without the hassle of handling so many external jars... Can get quite complicate to manage...

Answer 6

You could also download the jar file and put it in the Spark lib folder, because it is not installed with Spark, instead of beating your head trying to bet SBT build.sbt to work.

http://central.maven.org/maven2/org/apache/spark/spark-streaming-kafka-0-10_2.10/2.1.1/spark-streaming-kafka-0-10_2.10-2.1.1.jar

copy it to:

/usr/local/spark/spark-2.1.0-bin-hadoop2.6/jars/