我正在 Eclipse 中编写一个简单的 kafka - spark 流代码,以使用 spark 流使用来自 kafka 代理的消息。下面是代码,当我尝试从 Eclipse 运行代码时收到错误消息。
我还确保依赖 jars 就位,请帮助摆脱这个错误
对象 spark_kafka_streaming {
def main(args: Array[String]) {
val conf = new SparkConf()
.setAppName("The swankiest Spark app ever")
.setMaster("local[*]")
val ssc = new StreamingContext(conf, Seconds(60))
ssc.checkpoint("C:\\keerthi\\software\\eclipse-jee-mars-2-win32- x86_64\\eclipse")
println("Parameters:" + "zkorum:" + "group:" + "topicMap:"+"number of threads:")
val zk = "xxxxxxxx:2181"
val group = "test-consumer-group"
val topics = "my-replicated-topic"
val numThreads = 2
val topicMap = topics.split(",").map((_,numThreads.toInt)).toMap
val lines = KafkaUtils.createStream(ssc,zk,group,topicMap).map(_._2)
val words = lines.flatMap(_.split(" "))
val wordCounts = words.map(x => (x,1L)).count()
println("wordCounts:"+wordCounts)
//wordCounts.print
}
}
例外:
在 org.firststream.spark_kakfa.spark_kafka_streaming 的 org.firststream.spark_kakfa.spark_kafka_streaming$.main(spark_kafka_streaming.scala:30) 处的线程“main”java.lang.NoClassDefFoundError 中的异常:org/apache/spark/streaming/kafka/KafkaUtils$ .main(spark_kafka_streaming.scala) 引起:java.lang.ClassNotFoundException: org.apache.spark.streaming.kafka.KafkaUtils$ at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 还有 2 个
依赖项:
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.10</artifactId>
<version>0.8.1.1</version>
<scope>compile</scope>
<exclusions>
<exclusion>
<artifactId>jmxri</artifactId>
<groupId>com.sun.jmx</groupId>
</exclusion>
<exclusion>
<artifactId>jms</artifactId>
<groupId>javax.jms</groupId>
</exclusion>
<exclusion>
<artifactId>jmxtools</artifactId>
<groupId>com.sun.jdmk</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>0.8.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming-kafka_2.10</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming_2.10</artifactId>
<version>1.2.0</version>
</dependency>