Myasuka commented on issue #8067: [FLINK-11746][formats] Add thrift format support to Flink URL: https://github.com/apache/flink/pull/8067#issuecomment-477898064 @yuyang08 Aha, I find the `TypeExtractor` now, but why just return `null`? Please refer to [contribute-guide](https://flink.apache.org/contribute-code.html#coding-guidelines), WIP pull quest is not welcome. Please refer to [register-a-custom-serializer](https://ci.apache.org/projects/flink/flink-docs-release-1.7/dev/custom_serializers.html#register-a-custom-serializer-for-your-flink-program) doc, in which described clearly that Flink will use `KryoSerializer` to serialize Thrift classes. You should consider checkpoint serialized by `KryoSerializer` could be parsed with your new `ThriftSerializer`.
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