在 W7 上安装 Haddop HDInsight 之后。无法编译具有 hadoop 特定实现的 java 程序。他们错误地说：
c:\Hadoop\hadoop-1.1.0-SNAPSHOT\bin>javac -classpath `C:\Hadoop\hadoop- 1.1.0-SNA
PSHOT\hadoop-core.jar` C:\Z\WordCount.java -d C:\Z
C:\Z\WordCount.java:6: error: package org.apache.hadoop.fs does not exist
import org.apache.hadoop.fs.Path;
^
C:\Z\WordCount.java:7: error: package org.apache.hadoop.conf does not exist
import org.apache.hadoop.conf.*;
^
C:\Z\WordCount.java:8: error: package org.apache.hadoop.io does not exist
import org.apache.hadoop.io.*;
^
C:\Z\WordCount.java:9: error: package org.apache.hadoop.mapred does not exist
import org.apache.hadoop.mapred.*;
^
C:\Z\WordCount.java:10: error: package org.apache.hadoop.util does not exist
import org.apache.hadoop.util.*;
^
C:\Z\WordCount.java:14: error: cannot find symbol
public static class Map extends MapReduceBase implements Mapper<Long
Writable, Text, Text, IntWritable> {
^
symbol: class MapReduceBase
location: class WordCount
C:\Z\WordCount.java:14: error: cannot find symbol
public static class Map extends MapReduceBase implements Mapper<Long
Writable, Text, Text, IntWritable> {
^
symbol: class Mapper
location: class WordCount
C:\Z\WordCount.java:14: error: cannot find symbol
public static class Map extends MapReduceBase implements Mapper<Long
Writable, Text, Text, IntWritable> {
^
最初我尝试做
javac c:/z/WordCount.java
然后也尝试了
c:\Hadoop\hadoop-1.1.0-SNAPSHOT\bin>
javac -classpath `C:\Hadoop\hadoop-1.1.0-SNAPSHOT\hadoop-core.jar`
C:\Z\WordCount.java -d C:\Z
即，给出一个类路径。
好吧，我不确定 javac 到底指向哪里
这是我的 hadoop 文件夹中的内容：
01/09/2014 06:39 PM <DIR> .
01/09/2014 06:39 PM <DIR> ..
10/22/2013 01:43 PM <DIR> .eclipse.templates
01/09/2014 06:41 PM <DIR> bin
10/22/2013 01:43 PM 135,891 build.xml
10/22/2013 01:43 PM 16,372 CHANGES.branch-1-win.txt
10/22/2013 01:43 PM 463,978 CHANGES.txt
10/22/2013 01:43 PM <DIR> conf
10/22/2013 01:43 PM <DIR> contrib
10/22/2013 01:43 PM 6,843 hadoop-ant-1.1.0-SNAPSHOT.jar
10/22/2013 01:43 PM 421 hadoop-client-1.1.0-SNAPSHOT.jar
10/22/2013 01:43 PM 4,126,926 hadoop-core-1.1.0-SNAPSHOT.jar
10/22/2013 01:43 PM 4,126,926 hadoop-core.jar
10/22/2013 01:43 PM 146,277 hadoop-examples-1.1.0-SNAPSHOT.jar
10/22/2013 01:43 PM 146,277 hadoop-examples.jar
10/22/2013 01:43 PM 424 hadoop-minicluster-1.1.0-SNAPSHOT.jar
10/22/2013 01:43 PM 2,872,189 hadoop-test-1.1.0-SNAPSHOT.jar
10/22/2013 01:43 PM 2,872,189 hadoop-test.jar
10/22/2013 01:43 PM 307,933 hadoop-tools-1.1.0-SNAPSHOT.jar
10/22/2013 01:43 PM 307,933 hadoop-tools.jar
10/22/2013 01:43 PM <DIR> ivy
10/22/2013 01:43 PM 10,993 ivy.xml
10/22/2013 01:43 PM 6,631 Jira-Analysis.txt
01/09/2014 06:39 PM <DIR> lib
10/22/2013 01:43 PM <DIR> libexec
10/22/2013 01:43 PM 13,610 LICENSE.txt
01/15/2014 03:36 AM <DIR> logs
10/22/2013 01:43 PM 1,663 Monarch-CHANGES.txt
10/22/2013 01:43 PM 103 NOTICE.txt
10/22/2013 01:43 PM 2,295 README.Monarch.txt
10/22/2013 01:43 PM 1,397 README.txt
10/22/2013 01:43 PM <DIR> sbin
10/22/2013 01:42 PM <DIR> share
10/22/2013 01:43 PM <DIR> webapps
21 File(s) 15,567,271 bytes
13 Dir(s) 26,692,685,824 bytes free
请指教。