Hadoop-Streaming with C

[Christian Kremnitzer <kr...@ai.wu-wien.ac.at>]

Hello @all!

 

I am using Hadoop (version 0.14.3) and I tried to execute Hadoop-Streaming
with C.

Firstly, I compiled and linked my C-Files, then specified it as mapper and
reducer to hadoop-streaming.

 

The code seems to work, as no error message occurred on the web-interface.
The mapper receives input data correctly, but does no output of data.

Consequently, also the resulting output file is empty. 

 

Do I make any failures with stdin or stdout?

Could anyone give me a small example of a simple mapper and a simple reducer
in C (not C++)?

 

Thanks a lot in advance.

 

Christian

 

 

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