This is release 1.78.1 (gutsy) 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

• Remove unintentional log WARNING: All log messages before absl::InitializeLog() is called are written to STDERR. (#41639)
• Fix inconsistent GRPC_ENABLE_FORK_SUPPORT runtime defaults between gRPC Core and Python. (#41588).
  • This fixed #37710, a request processing hang in certain multithreaded environments: Other threads are currently calling into gRPC, skipping fork() handlers.
• Modernize the API Docs site: https://grpc.github.io/grpc/python. (#41494)

Ruby

• Build/test ruby 4.0 and build native gems with Ruby 4.0 support. (#41554)

This is release 1.78.0 (gutsy) 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.

C++

• adding address_sorting dep in naming test build. (#41045)

Objective-C

• [Backport][v1.78.x][Fix][Compiler] Plugins fall back to the edition 2023 for older protobuf. (#41358)

Python

• [python] aio: fix race condition causing asyncio.run() to hang forever during the shutdown process. (#40989)
• [Python] Migrate to pyproject.toml build system from setup.py builds. (#40833)
• [Python] Log error details when ExecuteBatchError occurs (at DEBUG level). (#40921)
• [Python] Update setuptools min version to 77.0.1 . (#40931)

Ruby

• [ruby] Fix version comparison for the ruby_abi_version symbol for ruby 4 compatibility. (#41061)

This is a prerelease of gRPC Core 1.78.0 (gutsy).

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 1.78.0 (gutsy).

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

This prerelease contains refinements, improvements, and bug fixes.

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