maltesander opened a new pull request, #11391: URL: https://github.com/apache/nifi/pull/11391
# Summary [NIFI-16069](https://issues.apache.org/jira/browse/NIFI-16069) - PutIcebergRecord fails with ClassCastException when writing complex types (arrays, maps, nested records) PutIcebergRecord fails to write FlowFiles whose schema contains complex/nested types like Iceberg list, map, or struct columns. RecordConverter only translates top-level scalar values (java.sql timestamp/date/time -> java.time) and passes complex values through unchanged. As a result, values reach Iceberg's Parquet writer in NiFi's native representation, which is incompatible with what Iceberg expects: - Nested records arrive as org.apache.nifi.serialization.record.MapRecord but Iceberg requires org.apache.iceberg.StructLike. - Array fields arrive as Object[] but Iceberg's writer requires a java.util.Collection. - Maps and elements/values nested inside these types are likewise not converted (e.g. a date inside an array or map value). Because conversion is gated on scalar field types only, records consisting solely of complex fields skip conversion entirely. # Tracking Please complete the following tracking steps prior to pull request creation. ### Issue Tracking - [Apache NiFi Jira](https://issues.apache.org/jira/browse/NIFI) issue created ### Pull Request Tracking - Pull Request title starts with Apache NiFi Jira issue number, such as `NIFI-00000` - Pull Request commit message starts with Apache NiFi Jira issue number, as such `NIFI-00000` - Pull request contains [commits signed](https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits) with a registered key indicating `Verified` status ### Pull Request Formatting - Pull Request based on current revision of the `main` branch - Pull Request refers to a feature branch with one commit containing changes # Verification Please indicate the verification steps performed prior to pull request creation. ### Build - [ ] Build completed using `./mvnw clean install -P contrib-check` - [ ] JDK 21 - [ ] JDK 25 ### Licensing - [ ] New dependencies are compatible with the [Apache License 2.0](https://apache.org/licenses/LICENSE-2.0) according to the [License Policy](https://www.apache.org/legal/resolved.html) - [ ] New dependencies are documented in applicable `LICENSE` and `NOTICE` files ### Documentation - [ ] Documentation formatting appears as expected in rendered files -- 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]
