我有下面的火花字計數程序:產生的原因:拋出java.lang.ClassNotFoundException:org.apache.hadoop.fs.CanSetDropBehind問題ecllipse
package com.sample.spark;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.*;
import org.apache.spark.api.java.function.FlatMapFunction;
import org.apache.spark.api.java.function.Function;
import org.apache.spark.api.java.function.Function2;
import org.apache.spark.api.java.function.PairFlatMapFunction;
import org.apache.spark.api.java.function.PairFunction;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import scala.Tuple2;
public class SparkWordCount {
public static void main(String[] args) {
SparkConf conf = new SparkConf().setAppName("wordcountspark").setMaster("local").setSparkHome("/Users/hadoop/spark-1.4.0-bin-hadoop1");
JavaSparkContext sc = new JavaSparkContext(conf);
//SparkConf conf = new SparkConf();
//JavaSparkContext sc = new JavaSparkContext("hdfs", "Simple App","/Users/hadoop/spark-1.4.0-bin-hadoop1", new String[]{"target/simple-project-1.0.jar"});
JavaRDD<String> textFile = sc.textFile("hdfs://localhost:54310/data/wordcount");
JavaRDD<String> words = textFile.flatMap(new FlatMapFunction<String, String>() {
public Iterable<String> call(String s) { return Arrays.asList(s.split(" ")); }
});
JavaPairRDD<String, Integer> pairs = words.mapToPair(new PairFunction<String, String, Integer>() {
public Tuple2<String, Integer> call(String s) { return new Tuple2<String, Integer>(s, 1); }
});
JavaPairRDD<String, Integer> counts = pairs.reduceByKey(new Function2<Integer, Integer, Integer>() {
public Integer call(Integer a, Integer b) { return a + b; }
});
counts.saveAsTextFile("hdfs://localhost:54310/data/output/spark/outfile");
}
}
我得到的產生的原因:java.lang中。 ClassNotFoundException的:
bin/spark-submit --class com.sample.spark.SparkWordCount --master local /Users/hadoop/spark-1.4.0-bin-hadoop1/finalJars/SparkJar-v2.jar
Maven的POM樣子:當我從ecllipse運行代碼但是如果我導出爲可運行罐子,從終端運行如下它的工作原理org.apache.hadoop.fs.CanSetDropBehind例外
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.sample.spark</groupId>
<artifactId>SparkRags</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>SparkRags</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency> <!-- Spark dependency -->
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.10</artifactId>
<version>1.4.0</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>0.23.11</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>1.2.1</version>
<scope>compile</scope>
</dependency>
</dependencies>
</project>
感謝Ramzy爲您的輸入。我使用「提取所需的庫到生成的jar」選項,可能會創建一個胖罐子。 – ragesh
很酷,如果您滿意,請接受答案,或者等待更多答案。快樂編碼 – Ramzy
「代理問題」是什麼意思? – ragesh