tzulitai opened a new pull request #7557: [FLINK-11406] [core] Return INCOMPATIBLE when nested serializers arity don't match in CompositeTypeSerializerSnapshot URL: https://github.com/apache/flink/pull/7557 ## What is the purpose of the change Right now, in `CompositeTypeSerializerSnapshot.resolveSchemaCompatibility(...)`, if arity of nested serializers don't match between the snapshot and the provided new serializer, a runtime exception is thrown. More ideally, this should return `TypeSerializerSchemaCompatibility.incompatible()`. ## Verifying this change A new unit test `CompositeTypeSerializerSnapshotTest.testNestedFieldSerializerArityMismatchPrecedence` covers this change.
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