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From Zhige Xin <xinzhi...@gmail.com>
Subject Can not find hadoop packages
Date Wed, 28 May 2014 19:13:13 GMT
Hi deal all,

I tried to compile my own WordCount.java using the following command:

*javac -classpath
/usr/local/Cellar/hadoop/2.2.0/libexec/share/hadoop/common/hadoop-common-2.2.0:/usr/local/Cellar/hadoop/2.2.0/libexec/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.2.0.jar:/usr/local/Cellar/hadoop/2.2.0/libexec/share/hadoop/common/lib/commons-cli-1.2.jar
-d myClasses WordCount.java*

but got some errors as follows:

*WordCount.java:1: error: package org.apache.hadoop.conf does not exist*

*import org.apache.hadoop.conf.Configuration;*

*                             ^*

*WordCount.java:2: error: package org.apache.hadoop.fs does not exist*

*import org.apache.hadoop.fs.Path;*

*                           ^*

*WordCount.java:3: error: package org.apache.hadoop.io
<http://org.apache.hadoop.io> does not exist*

*import org.apache.hadoop.io.Text;*

*                           ^*

*WordCount.java:11: error: cannot find symbol*

*        Configuration configuration = new Configuration();*

*        ^*

*  symbol:   class Configuration*

*  location: class WordCount*

*WordCount.java:11: error: cannot find symbol*

*        Configuration configuration = new Configuration();*

*                                          ^*

*  symbol:   class Configuration*

*  location: class WordCount*

*WordCount.java:14: error: cannot access Configuration*

*        Job job = new Job(configuration, "Word Count");*

*                  ^*

*  class file for org.apache.hadoop.conf.Configuration not found*

*WordCount.java:16: error: cannot find symbol*

*        job.setMapperClass(Map.class);*

*                           ^*

*  symbol:   class Map*

*  location: class WordCount*

*WordCount.java:17: error: cannot find symbol*

*        job.setReducerClass(Reduce.class);*

*                            ^*

*  symbol:   class Reduce*

*  location: class WordCount*

*WordCount.java:18: error: cannot find symbol*

*        job.setOutputKeyClass(Text.class);*

*                              ^*

*  symbol:   class Text*

*  location: class WordCount*

*WordCount.java:19: error: cannot find symbol*

*        job.setOutputValueClass(Text.class);*

*                                ^*

*  symbol:   class Text*

*  location: class WordCount*

*WordCount.java:22: error: cannot find symbol*

*        FileInputFormat.addInputPath(job, new Path(args[0]));*

*                                              ^*

*  symbol:   class Path*

*  location: class WordCount*

*WordCount.java:23: error: cannot find symbol*

*        FileOutputFormat.setOutputPath(job, new Path(args[1]));*

*                                                ^*

*  symbol:   class Path*

*  location: class WordCount*

*Note: WordCount.java uses or overrides a deprecated API.*

*Note: Recompile with -Xlint:deprecation for details.*

*12 errors*


I do not why because I checked this post

http://ac31004.blogspot.com/2013/11/hadoop-2x-jar-file-location-for.html

and added the jars (hadoop-common-2.2.0,
hadoop-mapreduce-client-core-2.2.0.jar and commons-cli-1.2.jar) into my
classpath but it still does not work.

Thanks!



Best,

Isaiah

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