cedricholzer opened a new pull request, #3730: URL: https://github.com/apache/avro/pull/3730
## What is the purpose of the change When FastReader is enabled and a field of type `union<array<?>>` with an array as default value is added, the Schema Evolution fails and throws an AvroRuntimeException. This change fixes the root cause of the bug in `FastReaderBuilder.java`. If the field schema is of type `Union`, then the first nested `Array` type is unboxed and passed to `GenericData::newArray` (which expects an `Array` schema) instead of the `Union` schema. While touching `TestReadingWritingDataInEvolvedSchemas.java`, this PR also removes unused imports and consistently uses `org.junit.jupiter.api.Assertions` like the rest of the project instead of mixing it with `org.junit.Assert`. ## Verifying this change This change added tests and can be verified as follows: - Added a test case that tests Schema Evolution while adding a new field of type `union<array<>> = []`. This test reproduces the bug on main, throwing an AvroRuntimeException, but passes on the fixed branch. ## Documentation This PR does not introduce new features. No documentation was added or edited. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
