# Weaviate v1.38.9 — v1.38.9 - Backup chunk integrity, usage module and async replication fixes

- Product: Weaviate (https://whatsnew.fyi/product/weaviate)
- Vendor: Weaviate
- Date: 2026-08-06
- Version: v1.38.9
- Original notes: https://github.com/weaviate/weaviate/releases/tag/v1.38.9
- Permalink: https://whatsnew.fyi/product/weaviate/releases/v1.38.9

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Skip collection tick while previous report is still running in usage module
- **changed** — Don't read file sizes in usage module when not needed
- **fixed** — Cancel and drain the cache prefill before HNSW teardown
- **fixed** — Fix 'quantizer not initialized' search error during RQ lazy initialization in flat index
- **changed** — Parallelize Muvera late-interaction rescoring in HNSW
- **changed** — Don't hold the DB index lock across a verbose node-status scan
- **changed** — Reduce allocations in tenant activity tracking
- **changed** — Don't allocate a mutex on every key-locker call
- **added** — Add TwelveLabs Marengo multimodal vectorizer
- **changed** — Parallelize block term creation across properties in BM25
- **changed** — Slab-allocate visited sparse-set segments in HNSW
- **added** — Respect per-query concurrency budget in compressed rescore for HNSW
- **fixed** — Fix usage module with named vectors where one is a prefix of another
- **fixed** — Handle ECONNRESET errors in handlePanics function
- **fixed** — Handle context cancellation in cursor operations to prevent incorrect nil returns
- **fixed** — Remove temporary files in compaction/cleanup on failure
- **fixed** — Switch off bloom filters for collection export
- **fixed** — Resolve replicas locally in async replication and never implicitly activate a tenant
- **fixed** — Refresh the memory monitor while shards are read-only
- **deprecated** — The non-hardlink backup fallback is deprecated and will be removed in v1.40

##### Breaking Changes 
*none*

##### New Features
*none*

##### Fixes
* fix(usage): skip collection tick while previous report is still running by @antas-marcin in https://github.com/weaviate/weaviate/pull/12139
* Dont read file sizes in usage module when not needed by @dirkkul in https://github.com/weaviate/weaviate/pull/12418
* fix(hnsw): cancel and drain the cache prefill before teardown by @moogacs in https://github.com/weaviate/weaviate/pull/12408
* flat: fix 'quantizer not initialized' search error during RQ lazy initialization by @asdine in https://github.com/weaviate/weaviate/pull/12419
* perf(hnsw): parallelize Muvera late-interaction rescoring by @etiennedi in https://github.com/weaviate/weaviate/pull/10536
* Don't hold the DB index lock across a verbose node-status scan by @dirkkul in https://github.com/weaviate/weaviate/pull/12375
* Reduce allocations in tenant activity tracking by @dirkkul in https://github.com/weaviate/weaviate/pull/12425
* Don't allocate a mutex on every key-locker call by @dirkkul in https://github.com/weaviate/weaviate/pull/12430
* feat(multi2vec-twelvelabs): add TwelveLabs Marengo multimodal vectorizer by @antas-marcin in https://github.com/weaviate/weaviate/pull/12431
* perf(bm25): parallelize block term creation across properties by @amourao in https://github.com/weaviate/weaviate/pull/12020
* perf(hnsw): slab-allocate visited sparse-set segments by @abdelr in https://github.com/weaviate/weaviate/pull/12374
* feat(hnsw): respect per-query concurrency budget in compressed rescore by @asdine in https://github.com/weaviate/weaviate/pull/12421
* Fix usage module with named vectors where one is a prefix of another by @dirkkul in https://github.com/weaviate/weaviate/pull/12428
* fix(panics): handle ECONNRESET errors in handlePanics function by @amourao in https://github.com/weaviate/weaviate/pull/12449
* fix: handle context cancellation in cursor operations to prevent incorrect nil returns by @amourao in https://github.com/weaviate/weaviate/pull/12448
* Remove tmp files in compaction/cleanup on failure by @dirkkul in https://github.com/weaviate/weaviate/pull/12452
* Switch off bloom filters for collection export by @dirkkul in https://github.com/weaviate/weaviate/pull/12455
* async replication: resolve replicas locally, never implicitly activate a tenant by @jeroiraz in https://github.com/weaviate/weaviate/pull/12256
* Refresh the memory monitor while shards are read-only by @dirkkul in https://github.com/weaviate/weaviate/pull/12468
* docs(backup): mark the non-hardlink backup fallback as deprecated (removed in v1.40) by @etiennedi in https://github.com/weaviate/weaviate/pull/12469
* fix: return the gRPC query profile when a query matches no objects by @etiennedi in https://github.com/weaviate/weaviate/pull/12381
* Use direct map acces for shard movement teardown by @dirkkul in https://github.com/weaviate/weaviate/pull/12467
* fix(tools): adapt qa_pr.sh log fetch to gh >= 2.97 escape-sequence guard by @antas-marcin in https://github.com/weaviate/weaviate/pull/12462
* fix(async-repl): stop worker-pool grow path leaking goroutines by @jeroiraz in https://github.com/weaviate/weaviate/pull/12107
* fix(async-repl): restore shard after a failed tenant freeze by @jeroiraz in https://github.com/weaviate/weaviate/pull/12108
* Merge stable/v1.37 into stable/v1.38 by @antas-marcin in https://github.com/weaviate/weaviate/pull/12472
* test(replication): wait for shard readiness after restart across read_repair suite by @jeroiraz in https://github.com/weaviate/weaviate/pull/12466
* Remove the unused shardReindexerV3 scheduler by @etiennedi in https://github.com/weaviate/weaviate/pull/12478
* fix(dynamic): clean up partial HNSW commit log on aborted flat->HNSW upgrade (v1.37) by @asdine in https://github.com/weaviate/weaviate/pull/12420
* Pool zstd encoders in backups by @dirkkul in https://github.com/weaviate/weaviate/pull/12477
* Backups: never store a partially written

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