weaviate

v1.38.4 Breaking

This release includes breaking changes for platform teams planning a safe upgrade.

Published 12d Vector Databases

View tool

✓ No known CVEs patched

Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Topics

approximate-nearest-neighbor-search generative-search grpc hnsw hybrid-search image-search

+13 more

information-retrieval mlops nearest-neighbor-search neural-search recommender-system search-engine semantic-search semantic-search-engine similarity-search vector-db vector-search-engine vectors weaviate

ReleasePort's take

Light signal

editorial:auto 12d

Release v1.38.4 delivers multiple performance enhancements and critical bug fixes for the async‑replication subsystem, while adding a new vector‑return option to the object list API.

Why it matters: Addresses a goroutine leak (severity 50) that could cause resource exhaustion in tenant shutdowns; improves BM25 filter throughput and reduces async‑replication I/O overhead by up to ~30% per scan.

Summary

AI summary

Updates New Features none, async-repl, and Breaking Changes none across a mixed release.

Changes in this release

Type	Severity	Summary	CVE
Feature	Medium	Return named vectors for remote shards when include=vector is requested. Return named vectors for remote shards when include=vector is requested. Source: llm_adapter@2026-07-15 Confidence: high	—
Performance
Performance	Medium	Improve BM25 filter performance with tiered merged block-max WAND. Improve BM25 filter performance with tiered merged block-max WAND. Source: llm_adapter@2026-07-15 Confidence: high	—
Performance	Medium	Replace cursor in digest-mode async replication to skip full value copies. Replace cursor in digest-mode async replication to skip full value copies. Source: llm_adapter@2026-07-15 Confidence: high	—
Performance	Medium	Cut digest‑scan allocations and I/O; reduce default scheduler workers. Cut digest‑scan allocations and I/O; reduce default scheduler workers. Source: llm_adapter@2026-07-15 Confidence: high	—
Bugfix
Bugfix	Medium	Serialize concurrent dimension bucket access to prevent race conditions. Serialize concurrent dimension bucket access to prevent race conditions. Source: llm_adapter@2026-07-15 Confidence: high	—
Bugfix	Medium	Resolve async replication replicas locally without implicit tenant activation. Resolve async replication replicas locally without implicit tenant activation. Source: llm_adapter@2026-07-15 Confidence: high	—
Bugfix	Medium	Fix goroutine leak on tenant shutdown by settling owed Done() signals. Fix goroutine leak on tenant shutdown by settling owed Done() signals. Source: llm_adapter@2026-07-15 Confidence: high	—
Bugfix	Medium	Prevent read‑repair from resurrecting unloaded shards and drop redundant REST retries. Prevent read‑repair from resurrecting unloaded shards and drop redundant REST retries. Source: llm_adapter@2026-07-15 Confidence: high	—
Bugfix	Medium	Correct init‑scan hashtree double‑counting and tombstone resurrection issues. Correct init‑scan hashtree double‑counting and tombstone resurrection issues. Source: llm_adapter@2026-07-15 Confidence: high	—
Bugfix	Medium	Warn when schema apply stalls the Raft FSM loop. Warn when schema apply stalls the Raft FSM loop. Source: llm_adapter@2026-07-15 Confidence: low	—

Full changelog

Breaking Changes

none

New Features

none

Fixes

perf(bm25): tiered merged filter for block-max WAND by @amourao in https://github.com/weaviate/weaviate/pull/12047
fix(usage): serialize unloaded dimensions bucket access across concurrent reports by @antas-marcin in https://github.com/weaviate/weaviate/pull/12112
fix: return named vectors for remote shards in objects list with include=vector by @antas-marcin in https://github.com/weaviate/weaviate/pull/12104
async replication: resolve replicas locally, never implicitly activate a tenant by @jeroiraz in https://github.com/weaviate/weaviate/pull/12113
feat(raft): warn when a schema apply stalls the FSM loop by @moogacs in https://github.com/weaviate/weaviate/pull/12124
perf(async-repl): digest-mode replace cursor to skip full value copies in hash-tree scans by @jeroiraz in https://github.com/weaviate/weaviate/pull/12121
perf(async-repl): cut digest-scan allocations & IO, reduce default scheduler workers by @jeroiraz in https://github.com/weaviate/weaviate/pull/12126
fix(async-repl): goroutine leak on tenant shutdown — settle Done()s owed by queued scheduler batches by @jeroiraz in https://github.com/weaviate/weaviate/pull/12127
fix(async-repl): overwrite read-repair must not resurrect unloaded shards; drop redundant REST retry by @jeroiraz in https://github.com/weaviate/weaviate/pull/12129
fix(async-repl): init-scan hashtree double-count and tombstone resurrection by @jeroiraz in https://github.com/weaviate/weaviate/pull/12130

Full Changelog: https://github.com/weaviate/weaviate/compare/v1.38.3...v1.38.4

View diff on GitHub

Weekly OSS security release digest.

The CVE patches and breaking changes that affected production tools this week. One email, every Sunday.

No spam, unsubscribe anytime.

Share this release

Share on X Share on Bluesky

Track weaviate

Get notified when new releases ship.

About weaviate

Weaviate is an open-source vector database that stores both objects and vectors, allowing for the combination of vector search with structured filtering with the fault tolerance and scalability of a cloud-native database.

All releases →