Task Queue Fairness (Pre-release)

This release adds support for Task Queue Fairness. Fairness is a new feature of Temporal’s task queues that allows for more control over the order that tasks are dispatched from a backlog. It’s intended to address common situations like multi-tenant applications and reserved capacity bands. For more details see the go doc's on temporal.Priority.

Fairness is currently not supported in any OSS Temporal release, but support will be coming soon. To experiment with this feature please see the pre-release development server or if you are a Temporal Cloud customer reach out to your SA to be enabled once it is available in Temporal Cloud.

Bugfixes

No longer retry "gRPC message size to large" error

The SDK will no longer retry "gRPC message size to large" errors or related errors. These errors occur if the user tries to make a gRPC request that exceeds the Temporal Service limits (typically 4 MB).

What’s Changed

2025-07-09 - 76f7c68 - Update test server to version 1.4.0 (#1994)
2025-07-09 - 7acd4d4 - Restore features branch to main (#1995)
2025-07-10 - 2ce5137 - Omit version token if empty (#1998)
2025-07-15 - 1dc8b10 - Fix data converter ToPayload error management (#2000)
2025-07-17 - 45621f4 - Remove experimental notice for UwS (#2004)
2025-07-21 - ce09baa - Add poller autoscaler (#1956)
2025-07-24 - 9ce618c - Accept search attributes for dev server (#2002)
2025-07-30 - f92dde1 - add compile time assertion (#2008)
2025-08-05 - 4026e02 - Move Nexus operation token generation outside of callback conditional (#2009)
2025-08-06 - 573d6de - Fix event type typo in Nexus cancellation types test (#2014)
2025-08-18 - f458e8a - Improve Nexus cancellation type test assertions (#2016)
2025-08-19 - 49ee963 - Upgraded go-grpc-middleware to v2.3.2 and x/tools to v0.36.0 (#2022)
2025-08-19 - 9ca81c6 - Add Fairness Keys/Weights (#2012)
2025-08-26 - 3080f44 - Add Go to Waitgroup (#2032)
2025-08-26 - 6d00d48 - Do not auto-retry gRPC-message-size-too-large errors (#2026)