Apache Lakehouse Projects Hit Release Snags Over Licenses, Specs, and Engine Gaps

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During the week of September 9–17, 2026, several Apache data lakehouse projects encountered release setbacks, with Iceberg Rust 0.11.0 failing two release votes, Polaris 1.8.0 receiving a blocking objection, and the Polaris Catalog Migrator requiring a second release candidate. The failures stemmed not from faulty code but from licensing oversights, a publishing error, and inconsistent encryption enforcement across engines. In a notable structural change, both the Apache Iceberg and Apache DataFusion communities voted unanimously to move the iceberg-datafusion integration crate into a new repository under the DataFusion project, aiming to align code ownership with the contributors most familiar with the engine. The move was designed to ensure that DataFusion experts maintain the integration layer while Iceberg development stays focused on the table format itself. Elsewhere, Apache Arrow shipped a Rust release introducing ALP floating-point encoding into a production Parquet implementation for the first time, and projects including Parquet, Polaris, and Apache Ossie debated how to handle cross-engine compatibility and configuration boundaries.

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