carp84 commented on issue #8331: [FLINK-11987][flink-connector-kafka-0.11] convert NEXT_TRANSACTIONAL_ID_HINT_DESCRIPTOR to a non-static variabl… URL: https://github.com/apache/flink/pull/8331#issuecomment-496840185 Thanks for the analysis @becketqin , and I also agree that we'd better fix the issue from inside `StateDescriptor`. Regarding the options, besides the already proposed two, there's a 3rd option: making `StateDescriptor.serializer` singleton with CAS plus removing the nulls out of `StateDescriptor.typeInfo` to prevent NPE caused by race condition, as suggested by @StephanEwen in JIRA. IMHO this is a more light-weight and quick fix for the time being. Wdyt? Thanks.
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