# Ray 2.9.1 — Ray-2.9.1

- Product: Ray (https://whatsnew.fyi/product/ray)
- Vendor: Anyscale
- Date: 2024-01-19
- Version: 2.9.1
- Original notes: https://github.com/ray-project/ray/releases/tag/ray-2.9.1
- Permalink: https://whatsnew.fyi/product/ray/releases/2.9.1

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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- **added** — Add debugpy as the ray debugger
- **fixed** — Fix task events profile events per task leak
- **fixed** — Make sure redis sync context and async context connect to the same redis instance
- **fixed** — Retry write if error during file clean up
- **fixed** — Improve handling the websocket server disconnect scenario
- **fixed** — Fix pydantic config documentation
- **changed** — Enable setting queue length response deadline via environment variable
- **added** — Add exponential backoff for queue_len_response_deadline_s

This patch release contains fixes for Ray Core, Ray Data, and Ray Serve.

#### Ray Core
🔨 Fixes:
- Adding debupgy as the ray debugger (#42311)
- Fix task events profile events per task leak (#42248) 
- Make sure redis sync context and async context connect to the same redis instance (#42040)
   
#### Ray Data
🔨 Fixes:
- [Data] Retry write if error during file clean up (#42326)

#### Ray Serve
🔨 Fixes:
- Improve handling the websocket server disconnect scenario (#42130) 
- Fix pydantic config documentation (#42216)
- Address issues under high network delays:
    - Enable setting queue length response deadline via environment variable (#42001)
    - Add exponential backoff for queue_len_response_deadline_s (#42041)