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Executing script from Hadoop

Madhumitha Baskaran
Ranch Hand

Joined: Feb 27, 2010
Posts: 66
I have a requirement in hadoop and I am not able to get it right. I have to execute a UNIX script inside hadoop program and whatever is being echoed by UNIX scripts should be obtained in the hadoop program as output from Unix script. How will it be possible?

In ordinary JAVA program, I am able to execute JAVA program and get the output of unix script. But same is not working in hadoop. Can you please help?
Alex Holmes

Joined: Oct 19, 2012
Posts: 21
Take a look at Hadoop Streaming:

It will allow you to use UNIX scripts in combination with MapReduce. Input records are supplied to stdin of your scripts, and output records are collected from stdout.

Author, Hadoop in Practice,
Blog at
I agree. Here's the link:
subject: Executing script from Hadoop
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