Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/3534
This change is probably uncritical:
- It seems this code path was never executed (by chance) because the
`RuntimeContext` pre-initializes state descriptors, and all the operators
directly supply serializers to the descriptors.
- As @aljoscha mentioned, in the current case or the KryoSerializer,
adding more configuration is not a problem.
Okay, +1, this seems safe.
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