# Ray 2.6.3 — Ray-2.6.3

- Product: Ray (https://whatsnew.fyi/product/ray)
- Vendor: Anyscale
- Date: 2023-08-15
- Version: 2.6.3
- Original notes: https://github.com/ray-project/ray/releases/tag/ray-2.6.3
- Permalink: https://whatsnew.fyi/product/ray/releases/2.6.3

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** — Fix memory leak from the end of object stream object in streaming generators
- **fixed** — Fix serve run help message
- **fixed** — Decrement ray_serve_deployment_queued_queries when client disconnects
- **added** — Add Learner API documentation for RLlib

The Ray 2.6.3 patch release contains fixes for Ray Serve, and Ray Core streaming generators. 

##### Ray Core
🔨 Fixes:
* [Core][Streaming Generator] Fix memory leak from the end of object stream object #38152 (#38206)

##### Ray Serve
🔨 Fixes:
* [Serve] Fix `serve run` help message (#37859) (#38018)
* [Serve] Decrement `ray_serve_deployment_queued_queries` when client disconnects (#37965) (#38020)


##### RLib
📖 Documentation:
* [RLlib][docs] Learner API Docs (#37729) (#38137)