Github user wenlong88 commented on the issue:
https://github.com/apache/flink/pull/2345
3q, @aljoscha
Maybe we can use different db instance for different key group. this
approach can only work well when key group number is limited to a certain
number which can not be too large.
Since the max number of key groups is limited by the max parallelism
config, I think different db instances can work.
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