Fabio Carneiro created AVRO-4358:
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Summary: [C] Schema resolution maps enum values by index instead
of symbol name
Key: AVRO-4358
URL: https://issues.apache.org/jira/browse/AVRO-4358
Project: Apache Avro
Issue Type: Bug
Reporter: Fabio Carneiro
The resolved writer and resolved reader copy the writer's enum index into the
reader's value without matching symbols by name
(lang/c/src/resolved-writer.c:1739, lang/c/src/resolved-reader.c:1629). This
causes the following issues:
- A writer with enum [RED, GREEN] and reader with enum [GREEN, RED]: the
resolved reader would assign the same index to a different symbol.
- If the writer uses a symbol the reader doesn't have, the reader gets an
out-of-range enum value instead of an error.
The proposed fix maps writer symbols to reader symbols by name when the
resolver is created, failing if a reader does not have a certain symbol.
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