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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