Apache Polaris 1.7.0 Fixes Data Loss Bug and Tightens Catalog Reliability

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Apache Polaris 1.7.0 was released on August 2, 2026, tagged by JB Onofré, addressing a critical data loss scenario where a network drop during a Spark table commit could cause clients to delete metadata files that were already successfully recorded in the catalog. The release introduces idempotent writes to prevent such failures caused by retry logic after ambiguous network responses. Beyond the data loss fix, the update includes a new beta API for semantic models, stricter credential vending and location validation, and improved orphan file cleanup. Although the changelog is dominated by dependency updates giving it the appearance of a routine maintenance release, the core changes focus on catalog correctness rather than new features. Apache Polaris is an open-source Iceberg REST catalog, originally co-created with Snowflake and donated to the Apache Software Foundation, graduating as a Top-Level Project in February 2026.

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