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

Not sure how Useful is the answer now. I faced the same issue today in fact working on an example from the same book (Hadoop definitive guide) I was able to execute an example program as follows:

• Write your java code and save it as .java file

• Compile your java program using:

  javac -classpath  
  

• Create a jar file containing your class file:

  jar cvf  
  

• Execute the jar file using hadoop command line:

  hadoop jar   
  

  e.g.

  hadoop jar FileSystemCat.jar FileSystemCat hdfs://localhost/user/root/MyFiles/meet_a_seer.txt
  

Hope it helps