Where does hadoop mapreduce framework send my System.out.print() statements ? (stdout)

Question

I want to debug a mapreduce script, and without going into much trouble tried to put some print statements in my program. But I cant seem to find them in any of the logs.

Answer 1

On a Hadoop cluster with yarn, you can fetch the logs, including stdout, with:

yarn logs -applicationId application_1383601692319_0008

For some reason, I've found this to be more complete than what I see in the webinterface. The webinterface did not list the output of System.out.println() for me.