Github user gyfora commented on the pull request:
https://github.com/apache/flink/pull/747#issuecomment-113958824
@rmetzger : I think I found the cause of the random kafka issues, it was
swallowed nul-lpointer exceptions which somehow led to this error, good to know
@StephanEwen : I implemented some of the points that you have raised, now
one can mix partitioned, non-partitioned and "Checkpointed state". (Although
state partitioning is not accessible from the API without the KeyedDataStream
yet)
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