Hadoop : Provide directory as input to MapReduce job

Question

I'm using Cloudera Hadoop. I'm able to run simple mapreduce program where I provide a file as input to MapReduce program.

This file contains all the other files to be processed by mapper function.

But, I'm stuck at one point.

/folder1
  - file1.txt
  - file2.txt
  - file3.txt

How can I specify the input path to MapReduce program as "/folder1", so that it can start processing each file inside that directory ?

Any ideas ?

EDIT :

1) Intiailly, I provided the inputFile.txt as input to mapreduce program. It was working perfectly.

>inputFile.txt
file1.txt
file2.txt
file3.txt

2) But now, instead of giving an input file, I want to provide with an input directory as arg[0] on command line.

hadoop jar ABC.jar /folder1 /output

Answer 1

The Problem is FileInputFormat doesn't read files recursively in the input path dir.

Solution: Use Following code

FileInputFormat.setInputDirRecursive(job, true); Before below line in your Map Reduce Code

FileInputFormat.addInputPath(job, new Path(args[0]));

You can check here for which version it was fixed.