Java 包org.apache.hadoop.conf不存在_Java_Linux_Git_Hadoop_Jenkins

Java 包org.apache.hadoop.conf不存在

java linux git hadoop jenkins

Java 包org.apache.hadoop.conf不存在,java,linux,git,hadoop,jenkins,Java,Linux,Git,Hadoop,Jenkins,我刚开始编译Hadoop代码，知道这个问题已经被回答了很多次。但是，我仍然发现很难找到正确的类路径来编译WordCount.java代码。我正在运行CentOS版本7 我的Hadoop版本是： Hadoop 2.7.1 Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r 15ecc87ccf4a0228f35af08fc56de536e6ce657a Compiled by jenkins on 2015-

我刚开始编译Hadoop代码，知道这个问题已经被回答了很多次。但是，我仍然发现很难找到正确的类路径来编译WordCount.java代码。我正在运行CentOS版本7

我的Hadoop版本是：

Hadoop 2.7.1 Subversion   
https://git-wip-us.apache.org/repos/asf/hadoop.git -r 15ecc87ccf4a0228f35af08fc56de536e6ce657a   
Compiled by jenkins on 2015-06-29T06:04Z  
Compiled with protoc 2.5.0  
From source with checksum fc0a1a23fc1868e4d5ee7fa2b28a58a  
This command was run using /usr/local/hadoop/share/hadoop/common/hadoop-common-2.7.1.jar

当我执行echo$PATH时，我得到了以下结果：

javac WordCount.java -cp $(hadoop classpath)

/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/sbin:/usr/lib/jre-1.7.0-openjdk/：/usr/local/hadoop/bin:/usr/local/hadoop/sbin:/home/hduser/.local/bin:/usr/lib/jre-1.7.0-openjdk/：/usr/local hadoop/bin:/usr/local/hadoop/sbin

我正在运行的Java版本是：

java version "1.7.0_91"
OpenJDK Runtime Environment (rhel-2.6.2.1.el7_1-x86_64 u91-b00)
OpenJDK 64-Bit Server VM (build 24.91-b01, mixed mode)

我确实在vi.bashrc中为Java和Hadoop设置了所有环境变量，如下所示，并通过了jps。Java也可以使用其他代码进行编译，但我认为Hadoop的类路径是错误的

Java变量 Hadoop变量当我试图在工作目录中编译WordCount.java时，出现以下错误：

WordCount.java:5: error: package org.apache.hadoop.conf does not exist
import org.apache.hadoop.conf.*;
^
WordCount.java:6: error: package org.apache.hadoop.fs does not exist
import org.apache.hadoop.fs.*;
^
WordCount.java:7: error: package org.apache.hadoop.conf does not exist
import org.apache.hadoop.conf.*;
^
WordCount.java:8: error: package org.apache.hadoop.io does not exist
import org.apache.hadoop.io.*;
^
WordCount.java:9: error: package org.apache.hadoop.mapreduce does not exist
import org.apache.hadoop.mapreduce.*;
^
WordCount.java:10: error: package org.apache.hadoop.mapreduce.lib.input does not exist
import org.apache.hadoop.mapreduce.lib.input.*;
^
WordCount.java:11: error: package org.apache.hadoop.mapreduce.lib.output does not exist
import org.apache.hadoop.mapreduce.lib.output.*;
^
WordCount.java:12: error: package org.apache.hadoop.util does not exist
import org.apache.hadoop.util.*;
^
WordCount.java:14: error: cannot find symbol
public class WordCount extends Configured implements Tool {
                               ^
  symbol: class Configured
WordCount.java:14: error: cannot find symbol
public class WordCount extends Configured implements Tool {
                                                     ^
  symbol: class Tool
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                    ^
  symbol:   class Mapper
  location: class WordCount
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                           ^
  symbol:   class LongWritable
  location: class WordCount
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                                         ^
  symbol:   class Text
  location: class WordCount
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                                               ^
  symbol:   class Text
  location: class WordCount
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                                                     ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:48: error: cannot find symbol
    private final static IntWritable one = new IntWritable(1);
                         ^
  symbol:   class IntWritable
  location: class Map
WordCount.java:49: error: cannot find symbol
    private Text word = new Text();
            ^
  symbol:   class Text
  location: class Map
WordCount.java:52: error: cannot find symbol
    public void map(LongWritable key, Text value,
                    ^
  symbol:   class LongWritable
  location: class Map
WordCount.java:52: error: cannot find symbol
    public void map(LongWritable key, Text value,
                                      ^
  symbol:   class Text
  location: class Map
WordCount.java:53: error: package Mapper does not exist
            Mapper.Context context) throws IOException, InterruptedException {
                  ^
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                       ^
  symbol:   class Reducer
  location: class WordCount
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                               ^
  symbol:   class Text
  location: class WordCount
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                                     ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                                                  ^
  symbol:   class Text
  location: class WordCount
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                                                        ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:66: error: cannot find symbol
    public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
                       ^
  symbol:   class Text
  location: class Reduce
WordCount.java:66: error: cannot find symbol
    public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
                                          ^
  symbol:   class IntWritable
  location: class Reduce
WordCount.java:66: error: cannot find symbol
    public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
                                                               ^
  symbol:   class Context
  location: class Reduce
WordCount.java:17: error: cannot find symbol
    int res = ToolRunner.run(new WordCount(), args);
              ^
  symbol:   variable ToolRunner
  location: class WordCount
WordCount.java:22: error: cannot find symbol
    Path inputPath = new Path(args[0]);
    ^
  symbol:   class Path
  location: class WordCount
WordCount.java:22: error: cannot find symbol
    Path inputPath = new Path(args[0]);
                         ^
  symbol:   class Path
  location: class WordCount
WordCount.java:23: error: cannot find symbol
    Path outputPath = new Path(args[1]);
    ^
  symbol:   class Path
  location: class WordCount
WordCount.java:23: error: cannot find symbol
    Path outputPath = new Path(args[1]);
                          ^
  symbol:   class Path
  location: class WordCount
WordCount.java:25: error: cannot find symbol
    Configuration conf = getConf();
    ^
  symbol:   class Configuration
  location: class WordCount
WordCount.java:25: error: cannot find symbol
    Configuration conf = getConf();
                         ^
  symbol:   method getConf()
  location: class WordCount
WordCount.java:26: error: cannot find symbol
    Job job = new Job(conf, this.getClass().toString());
    ^
  symbol:   class Job
  location: class WordCount
WordCount.java:26: error: cannot find symbol
    Job job = new Job(conf, this.getClass().toString());
                  ^
  symbol:   class Job
  location: class WordCount
WordCount.java:26: error: cannot find symbol
    Job job = new Job(conf, this.getClass().toString());
                                ^
  symbol: method getClass()
WordCount.java:28: error: cannot find symbol
    FileInputFormat.setInputPaths(job, inputPath);
    ^
  symbol:   variable FileInputFormat
  location: class WordCount
WordCount.java:29: error: cannot find symbol
    FileOutputFormat.setOutputPath(job, outputPath);
    ^
  symbol:   variable FileOutputFormat
  location: class WordCount
WordCount.java:33: error: cannot find symbol
    job.setInputFormatClass(TextInputFormat.class);
                            ^
  symbol:   class TextInputFormat
  location: class WordCount
WordCount.java:34: error: cannot find symbol
    job.setOutputFormatClass(TextOutputFormat.class);
                             ^
  symbol:   class TextOutputFormat
  location: class WordCount
WordCount.java:35: error: cannot find symbol
    job.setMapOutputKeyClass(Text.class);
                             ^
  symbol:   class Text
  location: class WordCount
WordCount.java:36: error: cannot find symbol
    job.setMapOutputValueClass(IntWritable.class);
                               ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:37: error: cannot find symbol
    job.setOutputKeyClass(Text.class);
                          ^
  symbol:   class Text
  location: class WordCount
WordCount.java:38: error: cannot find symbol
    job.setOutputValueClass(IntWritable.class);
                            ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:48: error: cannot find symbol
    private final static IntWritable one = new IntWritable(1);
                                               ^
  symbol:   class IntWritable
  location: class Map
WordCount.java:49: error: cannot find symbol
    private Text word = new Text();
                            ^
  symbol:   class Text
  location: class Map
WordCount.java:51: error: method does not override or implement a method from a supertype
    @Override
    ^
WordCount.java:68: error: cannot find symbol
    for (IntWritable value : values) {
         ^
  symbol:   class IntWritable
  location: class Reduce
WordCount.java:72: error: cannot find symbol
    context.write(key, new IntWritable(sum));
                           ^
  symbol:   class IntWritable
  location: class Reduce
WordCount.java:65: error: method does not override or implement a method from a supertype
    @Override
    ^
52 errors

WordCount.java:5:错误：包org.apache.hadoop.conf不存在
导入org.apache.hadoop.conf.*；
^
java:6:错误：包org.apache.hadoop.fs不存在
导入org.apache.hadoop.fs.*；
^
java:7:错误：包org.apache.hadoop.conf不存在
导入org.apache.hadoop.conf.*；
^
java:8:错误：包org.apache.hadoop.io不存在
导入org.apache.hadoop.io.*；
^
java:9:错误：包org.apache.hadoop.mapreduce不存在
导入org.apache.hadoop.mapreduce.*；
^
java:10:错误：包org.apache.hadoop.mapreduce.lib.input不存在
导入org.apache.hadoop.mapreduce.lib.input.*；
^
java:11:错误：包org.apache.hadoop.mapreduce.lib.output不存在
导入org.apache.hadoop.mapreduce.lib.output.*；
^
java:12:错误：包org.apache.hadoop.util不存在
导入org.apache.hadoop.util.*；
^
java:14:错误：找不到符号
公共类WordCount扩展配置的实现工具{
^
符号：已配置类
java:14:错误：找不到符号
公共类WordCount扩展配置的实现工具{
^
符号：类工具
java:47:错误：找不到符号
公共静态类映射扩展映射器{
^
符号：类映射器
位置：类字数
java:47:错误：找不到符号
公共静态类映射扩展映射器{
^
符号：可长写类
位置：类字数
java:47:错误：找不到符号
公共静态类映射扩展映射器{
^
符号：类文本
位置：类字数
java:47:错误：找不到符号
公共静态类映射扩展映射器{
^
符号：类文本
位置：类字数
java:47:错误：找不到符号
公共静态类映射扩展映射器{
^
符号：类IntWritable
位置：类字数
java:48:错误：找不到符号
私有最终静态IntWritable one=新的IntWritable（1）；
^
符号：类IntWritable
地点：班级地图
java:49:错误：找不到符号
私有文本字=新文本（）；
^
符号：类文本
地点：班级地图
java:52:错误：找不到符号
公共无效映射（可长写键、文本值、，
^
符号：可长写类
地点：班级地图
java:52:错误：找不到符号
公共无效映射（可长写键、文本值、，
^
符号：类文本
地点：班级地图
java:53:错误：包映射器不存在
上下文）抛出IOException、InterruptedException{
^
java:63:错误：找不到符号
公共静态类Reduce扩展Reducer{
^
符号：类减速器
位置：类字数
java:63:错误：找不到符号
公共静态类Reduce扩展Reducer{
^
符号：类文本
位置：类字数
java:63:错误：找不到符号
公共静态类Reduce扩展Reducer{
^
符号：类IntWritable
位置：类字数
java:63:错误：找不到符号
公共静态类Reduce扩展Reducer{
^
符号：类文本
位置：类字数
java:63:错误：找不到符号
公共静态类Reduce扩展Reducer{
^
符号：类IntWritable
位置：类字数
java:66:错误：找不到符号
公共void reduce（文本键、Iterable值、上下文上下文）引发IOException、InterruptedException{
^
符号：类文本
地点：班级减少
java:66:错误：找不到符号
公共void reduce（文本键、Iterable值、上下文上下文）引发IOException、InterruptedException{
^
符号：类IntWritable
地点：班级减少
java:66:错误：找不到符号
公共void reduce（文本键、Iterable值、上下文上下文）引发IOException、InterruptedException{
^
符号：类上下文
地点：班级减少
java:17:错误：找不到符号
int res=ToolRunner.run（new WordCount（），args）；
^
WordCount.java:5: error: package org.apache.hadoop.conf does not exist
import org.apache.hadoop.conf.*;
^
WordCount.java:6: error: package org.apache.hadoop.fs does not exist
import org.apache.hadoop.fs.*;
^
WordCount.java:7: error: package org.apache.hadoop.conf does not exist
import org.apache.hadoop.conf.*;
^
WordCount.java:8: error: package org.apache.hadoop.io does not exist
import org.apache.hadoop.io.*;
^
WordCount.java:9: error: package org.apache.hadoop.mapreduce does not exist
import org.apache.hadoop.mapreduce.*;
^
WordCount.java:10: error: package org.apache.hadoop.mapreduce.lib.input does not exist
import org.apache.hadoop.mapreduce.lib.input.*;
^
WordCount.java:11: error: package org.apache.hadoop.mapreduce.lib.output does not exist
import org.apache.hadoop.mapreduce.lib.output.*;
^
WordCount.java:12: error: package org.apache.hadoop.util does not exist
import org.apache.hadoop.util.*;
^
WordCount.java:14: error: cannot find symbol
public class WordCount extends Configured implements Tool {
                               ^
  symbol: class Configured
WordCount.java:14: error: cannot find symbol
public class WordCount extends Configured implements Tool {
                                                     ^
  symbol: class Tool
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                    ^
  symbol:   class Mapper
  location: class WordCount
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                           ^
  symbol:   class LongWritable
  location: class WordCount
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                                         ^
  symbol:   class Text
  location: class WordCount
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                                               ^
  symbol:   class Text
  location: class WordCount
WordCount.java:47: error: cannot find symbol
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
                                                                     ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:48: error: cannot find symbol
    private final static IntWritable one = new IntWritable(1);
                         ^
  symbol:   class IntWritable
  location: class Map
WordCount.java:49: error: cannot find symbol
    private Text word = new Text();
            ^
  symbol:   class Text
  location: class Map
WordCount.java:52: error: cannot find symbol
    public void map(LongWritable key, Text value,
                    ^
  symbol:   class LongWritable
  location: class Map
WordCount.java:52: error: cannot find symbol
    public void map(LongWritable key, Text value,
                                      ^
  symbol:   class Text
  location: class Map
WordCount.java:53: error: package Mapper does not exist
            Mapper.Context context) throws IOException, InterruptedException {
                  ^
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                       ^
  symbol:   class Reducer
  location: class WordCount
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                               ^
  symbol:   class Text
  location: class WordCount
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                                     ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                                                  ^
  symbol:   class Text
  location: class WordCount
WordCount.java:63: error: cannot find symbol
    public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {
                                                                        ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:66: error: cannot find symbol
    public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
                       ^
  symbol:   class Text
  location: class Reduce
WordCount.java:66: error: cannot find symbol
    public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
                                          ^
  symbol:   class IntWritable
  location: class Reduce
WordCount.java:66: error: cannot find symbol
    public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
                                                               ^
  symbol:   class Context
  location: class Reduce
WordCount.java:17: error: cannot find symbol
    int res = ToolRunner.run(new WordCount(), args);
              ^
  symbol:   variable ToolRunner
  location: class WordCount
WordCount.java:22: error: cannot find symbol
    Path inputPath = new Path(args[0]);
    ^
  symbol:   class Path
  location: class WordCount
WordCount.java:22: error: cannot find symbol
    Path inputPath = new Path(args[0]);
                         ^
  symbol:   class Path
  location: class WordCount
WordCount.java:23: error: cannot find symbol
    Path outputPath = new Path(args[1]);
    ^
  symbol:   class Path
  location: class WordCount
WordCount.java:23: error: cannot find symbol
    Path outputPath = new Path(args[1]);
                          ^
  symbol:   class Path
  location: class WordCount
WordCount.java:25: error: cannot find symbol
    Configuration conf = getConf();
    ^
  symbol:   class Configuration
  location: class WordCount
WordCount.java:25: error: cannot find symbol
    Configuration conf = getConf();
                         ^
  symbol:   method getConf()
  location: class WordCount
WordCount.java:26: error: cannot find symbol
    Job job = new Job(conf, this.getClass().toString());
    ^
  symbol:   class Job
  location: class WordCount
WordCount.java:26: error: cannot find symbol
    Job job = new Job(conf, this.getClass().toString());
                  ^
  symbol:   class Job
  location: class WordCount
WordCount.java:26: error: cannot find symbol
    Job job = new Job(conf, this.getClass().toString());
                                ^
  symbol: method getClass()
WordCount.java:28: error: cannot find symbol
    FileInputFormat.setInputPaths(job, inputPath);
    ^
  symbol:   variable FileInputFormat
  location: class WordCount
WordCount.java:29: error: cannot find symbol
    FileOutputFormat.setOutputPath(job, outputPath);
    ^
  symbol:   variable FileOutputFormat
  location: class WordCount
WordCount.java:33: error: cannot find symbol
    job.setInputFormatClass(TextInputFormat.class);
                            ^
  symbol:   class TextInputFormat
  location: class WordCount
WordCount.java:34: error: cannot find symbol
    job.setOutputFormatClass(TextOutputFormat.class);
                             ^
  symbol:   class TextOutputFormat
  location: class WordCount
WordCount.java:35: error: cannot find symbol
    job.setMapOutputKeyClass(Text.class);
                             ^
  symbol:   class Text
  location: class WordCount
WordCount.java:36: error: cannot find symbol
    job.setMapOutputValueClass(IntWritable.class);
                               ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:37: error: cannot find symbol
    job.setOutputKeyClass(Text.class);
                          ^
  symbol:   class Text
  location: class WordCount
WordCount.java:38: error: cannot find symbol
    job.setOutputValueClass(IntWritable.class);
                            ^
  symbol:   class IntWritable
  location: class WordCount
WordCount.java:48: error: cannot find symbol
    private final static IntWritable one = new IntWritable(1);
                                               ^
  symbol:   class IntWritable
  location: class Map
WordCount.java:49: error: cannot find symbol
    private Text word = new Text();
                            ^
  symbol:   class Text
  location: class Map
WordCount.java:51: error: method does not override or implement a method from a supertype
    @Override
    ^
WordCount.java:68: error: cannot find symbol
    for (IntWritable value : values) {
         ^
  symbol:   class IntWritable
  location: class Reduce
WordCount.java:72: error: cannot find symbol
    context.write(key, new IntWritable(sum));
                           ^
  symbol:   class IntWritable
  location: class Reduce
WordCount.java:65: error: method does not override or implement a method from a supertype
    @Override
    ^
52 errors

<dependencies>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-hdfs</artifactId>
        <version>2.7.1</version>
    </dependency>

    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-common</artifactId>
        <version>2.7.1</version>
    </dependency>

    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-core</artifactId>
        <version>1.2.1</version>
    </dependency>
</dependencies>

javac WordCount.java -cp $(hadoop classpath)

javac WordCount.java -cp $(/usr/local/Cellar/hadoop/2.8.0/bin/hadoop classpath)