Github user gyfora commented on the pull request:
https://github.com/apache/flink/pull/1155#issuecomment-141945790
I still think that we should use PartitionedOperatorStates here, that will
also help in case we start thinking about dynamic repartitioning. It's not hard
to modify the tests so that they use some partitioning info (so if it unit
testable with local state it is unit testable with partitioned state).
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