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Posted to issues@flink.apache.org by "asomov (via GitHub)" <gi...@apache.org> on 2025/12/17 09:17:09 UTC

Re: [PR] [FLINK-34257][core] Update Flink YAML Parser to Support YAML 1.2 Specification. [flink]

asomov commented on PR #24213:
URL: https://github.com/apache/flink/pull/24213#issuecomment-3664403250

   @JunRuiLee minor clarification after looking into the unit tests.
   YAML 1.2 does support most of the features which are now excluded. SnakeYAML Engine does support them as well. But it requires to explicitly configure a [Schema](https://yaml.org/spec/1.2.1/#Schema).
   Unfortunately, YAML 1.2 recommends [the Core schema](https://yaml.org/spec/1.2.1/#id2804923) (and not [JSON schema](https://yaml.org/spec/1.2.1/#id2803231)) by default. Here SnakeYAML deviates and it makes the JSON schema by default (this is what is proven in the unit tests)


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