Which Hadoop to use for Mahout 0.9

I'm using Mahout Cookbook, which shows examples for Mahout 0.8 and uses Hadoop 0.23.5.

I'm new to the whole system, so I would like to know which Hadoop version to use when running Mahout 0.9?

Thanks

Solution

When pulling Mahout 0.9 from maven it includes hadoop-core version 1.2.1. Mahout version 0.9 does not work with hadoop 2 according to this. It is resolved in the latest master branch on github, but this requires you to recompile mahout from the source and include the hadoop 2 libraries. Mahout 1.0 should support hadoop 2.X versions.