# gRPC v1.84.0

> Networking & Messaging · 2026-09-11

A maintenance release that enables gRPC capabilities and observability, broadens xDS matching, removes a WRR guard, and corrects proxy hostname handling. It also updates connection scaling service configuration and server listener matching.

## Action needed
- **[breaking]** The `v2_non_owning_waker_implementation` experiment enabled
  - The `v2_non_owning_waker_implementation` experiment is enabled in the promise-based filter.
- **[breaking]** The `WRR` custom backend metrics guard removed
  - The release removes the `WRR` environment-variable guard for custom backend metrics.

## Other recorded changes
- 4 (constraint_changed 2, added 1, defect_corrected 1)

[Full analysis](https://ratatosk.io/en/releases/grpc/v1.84.0)

[Original release notes](https://github.com/grpc/grpc/releases/tag/v1.84.0)