TODO!!! Deal with this issue.
TODO!!! Deal with this issue. The problem is grouping by Kryo serialized objects silently breaks the results. If Kryo gets in front of TupleSerialization (and possibly Writable, unclear at this time), grouping is broken. There are two issues here: 1) Kryo objects not being compared properly. 2) Kryo being used instead of cascading.
We must identify each and fix these bugs.