v2.6.17

n4ze3m/page-assistv2.6.17May 22, 2026by yanliang567

AI Summary

The v2.6.17 server release introduces partial update operators for Array fields and improves isolation between load and search operations. It also resolves several stability issues related to query routing and metadata management.

Key Highlights

Adds ARRAY_APPEND and ARRAY_REMOVE partial update operators for Array fields
Improves load/search isolation using separate C++ executor pools
Fixes filter expression template usage with string field predicates
Fixes stale segment distribution updates affecting query routing
Fixes transient shard errors that caused query failures and degraded availability

New Features

Array field partial update operators exposed via both gRPC and REST upsert APIs
Improved load/search isolation by converting SegmentLoad to async futures

Full Release Notes

## v2.6.17

Release date: May 22, 2026

| Milvus Version | Python SDK Version | Node.js SDK Version | Java SDK Version | Go SDK Version |
| -------------- | ------------------ | ------------------- | ---------------- | -------------- |
| 2.6.17         | 2.6.14             | 2.6.14              | 2.6.20           | 2.6.4          |

We are excited to announce the release of Milvus v2.6.17! This release introduces Array field partial update operators, improves load/search isolation, and resolves several stability and query routing issues.

### Improvements

- Added [`ARRAY_APPEND` and `ARRAY_REMOVE` partial update operators](upsert-entities.md#Upsert-ARRAY-fields-with-partial-update-operators) for Array fields, exposed through both gRPC and REST upsert APIs ([#49328](https://github.com/milvus-io/milvus/pull/49328), [#49724](https://github.com/milvus-io/milvus/pull/49724))
- Improved load/search isolation by using separate C++ executor pools and converting SegmentLoad and ReopenSegment to async futures with proper context cancellation ([#49764](https://github.com/milvus-io/milvus/pull/49764))

### Bug fixes

- Fixed an issue where filter expression templates could not be used with string field predicates ([#49703](https://github.com/milvus-io/milvus/pull/49703))
- Fixed an issue where stale segment distribution updates after delegator close could corrupt query routing ([#49727](https://github.com/milvus-io/milvus/pull/49727))
- Fixed an issue where releasing a collection could leave stale replica state due to premature metadata cleanup in QueryCoord ([#49730](https://github.com/milvus-io/milvus/pull/49730))
- Fixed an issue where transient shard errors caused replicas to be blacklisted, leading to unnecessary query failures and degraded availability ([#49740](https://github.com/milvus-io/milvus/pull/49740), [#49776](https://github.com/milvus-io/milvus/pull/49776))
- Fixed missing GetReplicateConfiguration RPC forwarding in the proxy service ([#49810](https://github.com/milvus-io/milvus/pull/49810))
- Fixed a potential use-after-free crash when closing the packed writer multiple times or during compaction cleanup paths ([#49816](https://github.com/milvus-io/milvus/pull/49816))