MLBase by Danny Bickson.
From the post:
Here is an interesting post I got from Ben Lorica, O’Reilly about MLbase: http://strata.oreilly.com/2013/02/mlbase-scalable-machine-learning-made-accessible.html.
It is a proof of concept machine learning library on top of Spark, with a custom declarative language called MQL.
Slated for release in August, 2013.
Suggest you digest Lorica’s post and the links therein.