How can I run Hadoop run with a Java class?

Question

I am following the book Hadoop: the definitive Guide.

I am confused on example 3-1.

There is a Java source file, URLCat.java. I use javac to co

Answer 1

step 1: Compile Java Program:

javac URLCat.java -classpath $HADOOP_HOME/share/hadoop/common/hadoop-common-2.7.0.jar

step 2: Create jar file :

jar cvf URLCat.jar URLCat.class

Step 3: Execute program : (mention your hdfs file location)

hadoop jar URLCat.jar URLCat hdfs://localhost:9000/pcode/wcinput.txt