This is release 1.76.0 (genuine) of gRPC Core.

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This release contains refinements, improvements, and bug fixes, with highlights listed below.

Core

• Prioritize system CA over bundled CA. (#40583)
• [event_engine] Introduce a event_engine_poller_for_python experiment. (#40243)
• [metrics] add grpc.lb.backend_service label. (#40486)

C#

• [csharp tools] #39374 Grpc.Tools can't process file Suffix name with Upper character. (#40072)

Python

• [Python] gRPC AsyncIO: Improve CompletionQueue polling performance. (#39993)

This is a prerelease of gRPC Core 1.76.0 (genuine).

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This prerelease contains refinements, improvements, and bug fixes.

This is release gRPC Core 1.75.1 (gemini).

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This release contains refinements, improvements, and bug fixes.

What's Changed

Python

• Release grpcio wheels with Python 3.14 support (#40403)
• Asyncio: fixes grpc shutdown race condition occurring during python interpreter finalizations. (#40447)
  • This also addresses previously reported issues with empty error message on Python interpreter exit (Error in sys.excepthook:/Original exception was: empty): #36655, #38679, #33342
• Python 3.14: preserve current behavior when using grpc.aio async methods outside of a running event loop. (#40750)
  • Note: using async methods outside of a running event loop is discouraged by Python, and will be deprecated in future gRPC releases. Please use the asyncio.run() function (or asyncio.Runner for custom loop factories). For interactive mode, use dedicated asyncio REPL: python -m asyncio.

Full Changelog: v1.75.0...v1.75.1

This is release 1.75.0 (gemini) of gRPC Core.

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This release contains refinements, improvements, and bug fixes, with highlights listed below.

Core

• [Security] Cherry Pick Spiffe Verification. (#40515)
• [Python][Typeguard] Part 3 - Add Typeguard to AIO stack in tests. (#40217)
• [c-ares] update version to 1.34.5. (#39508)
• [pick_first] fix bug that caused us to stop attempting to connect. (#40162)

C++

• [OTel C++] Implement retry metrics. (#39195)

Objective-C

• Fix data race by adding custom getter for state property with @synchronized locking. (#40146)

Python

• gRPC Python (grpcio) now depends on typing-extensions~=4.13. (#40137)
• Update musllinux wheels from musllinux_1_1 to musllinux_1_2. (#40317)
  • Dropping musllinux_1_1 because it reached EOL in November 2024
  • Reference on musllinux platform tags: PEP 656
• grpc.aio typehint fixes. (#40215, #40217)
  • Metadata type validation: Fixed metadata handling to support all sequence types (not just tuples), preventing runtime errors. Enhanced metadata type validation: isinstance(metadata, Sequence) instead of isinstance(metadata, tuple)
  • Serializer parameters: Changed to Optional[SerializingFunction] for more accurate type representation
  • Fixing the error in public API: ClientCallDetails.method was declared as str but always called with bytes, see InterceptedUnaryUnaryCall.
• Fixes issue #40325 with grpcio failing to install on all non-Mac Apple devices internal builds. (#40347)

Ruby

• Ruby: Mark credential object in channel. (#40394)
• [Ruby] Add rubygems support for linux-gnu and linux-musl platforms. (#39549)

This is a prerelease of gRPC Core 1.75.0 (gemini).

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This prerelease contains refinements, improvements, and bug fixes.

This is release gRPC Core 1.74.1 (gee).

This is a patch release for grpc-ruby.

Ruby

• [Backport of #40394 to v1.74.x] Mark credential object in channel to fix #40368

This is release 1.74.0 (gee) of gRPC Core.

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This release contains refinements, improvements, and bug fixes, with highlights listed below.

Core

• [OTel C++, Posix EE] Plumb TCP write timestamps and metrics to OTel tracers. (#39946)
• [event_engine] Implement fork support in Posix Event Engine. (#38980)
• [http2] Fix GRPC_ARG_HTTP2_STREAM_LOOKAHEAD_BYTES for when BDP is disabled. (#39585)

Objective-C

• [dep] Upgrade Protobuf Version 31.1. (#39916)

PHP

• [PHP] Fully qualify stdClass with global namespace. (#39996)
• [php] Fix PHPDoc so that UnaryCall defines the proper return type. (#37563)
• fix typing of nullable parameters. (#39199)

Python

• [EventEngine] Fix the issue with gRPC Python Client not reconnecting in certain situations: #38290, #39113, #39631. (#39894)
• Fix gRPC Python docs website layout - use spaces optimally. (#40073)

Ruby

• [Ruby] Add rubygems support for linux-gnu and linux-musl platforms . (#40174)
• [ruby] enable EE fork support. (#39786)
• [ruby] Return nil for c functions expected to return a VALUE. (#39214)
• [ruby] remove connectivity state watch thread, fix cancellations from spurious signals. (#39409)
• [ruby] Drop Ruby 3.0 support. (#39607)

This is a prerelease of gRPC Core 1.74.0 (gee).

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This prerelease contains refinements, improvements, and bug fixes.

This is a prerelease of gRPC Core 1.74.0 (gee).

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This prerelease contains refinements, improvements, and bug fixes.

This is release 1.72.2 (gusto) of gRPC Core.

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This release contains refinements, improvements, and bug fixes, with highlights listed below.

Python

• [Backport of #39894 to v1.72.x] Fix the issue with gRPC Python Client not reconnecting in certain situations: #38290, #39113, #39631. (#39949)