# Ray 1.12.1 — Ray-1.12.1

- Product: Ray (https://whatsnew.fyi/product/ray)
- Vendor: Anyscale
- Date: 2022-05-16
- Version: 1.12.1
- Original notes: https://github.com/ray-project/ray/releases/tag/ray-1.12.1
- Permalink: https://whatsnew.fyi/product/ray/releases/1.12.1

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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- **fixed** — Fix bug with memory limit fetching when running Ray in a container, allowing Ray to work on Google Colab again
- **added** — Resume building ray-ml Docker images for CPU after they were stopped in Ray 1.9
- **fixed** — Fix MLflow run to start under the correct experiment for Ray Train and Ray Tune integrations
- **fixed** — Fix APPO in eager mode for RLlib
- **fixed** — Fix Alphastar for TF2 with tracing enabled in RLlib
- **fixed** — Fix replica leak in anonymous namespaces for Ray Serve

Patch release with the following fixes:

- **Ray now works on Google Colab again!** The bug with memory limit fetching when running Ray in a container is now fixed (https://github.com/ray-project/ray/pull/23922).
- `ray-ml` Docker images for CPU will start being built again after they were stopped in Ray 1.9 (https://github.com/ray-project/ray/pull/24266).
- [Train/Tune] Start MLflow run under the correct experiment for Ray Train and Ray Tune integrations (https://github.com/ray-project/ray/pull/23662).
- [RLlib] Fix for APPO in eager mode (https://github.com/ray-project/ray/pull/24268).
- [RLlib] Fix Alphastar for TF2 and tracing enabled (https://github.com/ray-project/ray/commit/c5502b2aa57376b26408bb297ff68696c16f48f1).
- [Serve] Fix replica leak in anonymous namespaces (https://github.com/ray-project/ray/pull/24311).