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Radoop has unique capabilities where you can push the workflow to be executed on a hadoop cluster.
This is part of Rapidminer's commercial offering,
So at this point there is no free alternative to Radoop.
You can use the Read Hive operator to get sample data out of hadoop cluster and work on it using the Rapidminer operators.
Hopefully this helps.
But I will highly recommend considering Radoop since it provides really powerful capabilities for distributed data mining on hadoop in a code-optional manner
Just to follow up since your post was prior to August... THere is a free version of RapidMiner Radoop now available for download: https://rapidminer.com/resource/rapidminer-radoop-free-download/
Hope this helps!