The Jar files for Hadoop 2.x have moved location from Hadoop 1.x. I found the following command
javac -classpath $HADOOP_HOME/share/hadoop/common/hadoop-common-2.2.0.jar:$HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.2.0.jar:$HADOOP_HOME/share/hadoop/common/lib/commons-cli-1.2.jar -d wordcount_classes myWordCount.java
will allow you to compile the standard wordcount example code. You can see that the common files are in /share/hadoop/common/ and the mapreduce files are in /share/hadoop/mapreduce/. Finally the common lib file are in /share/hadoop/common/lib
This post is in answer to this stackoverflow question:
http://stackoverflow.com/questions/19488894/compile-hadoop-2-2-0-job
(or set your classpath lke this
export CLASSPATH=$HADOOP_HOME/share/hadoop/common/hadoop-common-2.2.0.jar:$HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.2.0.jar:$HADOOP_HOME/share/hadoop/common/lib/commons-cli-1.2.jar
and compile like this:
javac -classpath $CLASSPATH -d myWordCountClasses myWordCount.java
)
