Apache Iceberg, Polaris, and Parquet Face Release Hurdles Over License Gaps

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During the week of September 15–23, 2026, Apache Data Lakehouse projects including Iceberg, Polaris, and Parquet encountered repeated release setbacks due to missing or incorrect license file entries. Iceberg 1.12.0 advanced to a second release candidate after reviewers discovered bundled web assets lacking proper license notices, while Polaris 1.8.0 failed two separate votes over a NOTICE gap and an incorrect file header. Beyond release logistics, significant design work progressed across projects, including Parquet's Modular Footer proposal, Iceberg's materialized view spec, and DataFusion taking ownership of the Iceberg Rust integration. A common theme emerged across all three projects: how servers and readers should behave when they cannot fulfill a client request, with every project converging on explicit failure and documented behavior as the answer. Community verification of Iceberg 1.12.0 RC0 was notably thorough, with multiple contributors confirming test results and tarball integrity before the license issues ultimately required a new candidate.

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