Kafka Connect: Fix recursive schemas and empty structs in schema conversion #14834
+159
−60
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Fixes StackOverflowError when converting Kafka Connect schemas that contain recursive type references (e.g., protobuf's
google.protobuf.Structor self-referencing messages likemessage Node { repeated Node children = 1; }).Additionally, this change handles empty structs (protobuf messages with no fields) by converting them to StringType, since Parquet cannot write empty groups.
Attempts to address #14697