Weaviate v1.39.1 introduces REST search endpoints and async replication fixes

The Weaviate project has released version 1.39.1, as detailed in its GitHub release notes. This update includes fixes to async replication, LSM performance, and various modules such as Backup and Geo. Notable additions include new REST search endpoints for BM25 keyword search, hybrid search, near-object search, and aggregate counts. Other fixes address issues like goroutine leaks in async replication, shard readiness after restarts, and geo vector cache retention across deletion cycles. Deprecated features, such as the non-hardlink backup fallback, are marked for removal in version 1.40.

Operators should carefully review the implications of these changes, particularly the introduction of new REST endpoints and fixes to async replication. Systems relying on older replication behaviors or backup mechanisms may require adjustments to ensure compatibility. Additionally, deprecated features like the non-hardlink backup fallback should be assessed for removal before upgrading to v1.40. Testing the new REST endpoints and verifying that async replication fixes align with expected behavior will be critical to avoiding disruptions.