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

I did this based on help found on this site and the hadoop tutorial.

mkdir urlcat_classes

javac -classpath /usr/lib/hadoop/hadoop-0.20.2-cdh3u1-core.jar -d     urlcat_classes URLCat.java

jar -cvf urlcat.jar -C urlcat_classes .

hadoop jar urlcat.jar no.gnome.URLCat       
hdfs://localhost/user/claus/sample.txt



no.gnome is from 'package no.gnome;' in URLCat.java.

regards
Claus