A homebrew user! You can rely on the hadoop script to generate a usable runtime and compile time classpath for you. So just do it as below (assuming 'hadoop' as a command is on your $PATH already):
$ javac -cp $(hadoop classpath) -d myClasses WordCount.java On Thu, May 29, 2014 at 12:43 AM, Zhige Xin <xinzhi...@gmail.com> wrote: > 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 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 -- Harsh J
