Github user StefanRRichter commented on the issue:
https://github.com/apache/flink/pull/3508
I wonder if there could also exist a case for broadcasting operator state
(non-keyed), where only one operator instance is selected as sender and all
others receive on restore. Furthermore, the union aspect may (or may not)
happen at restore time, but not at the time that a user requests this state.
For what this currently does, I think `ReplicatingState` describes it pretty
well. Broadcast would be a good description from the operator's perspective: it
broadcasts the generated data to all peers on restore.
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