#1877·abseil-cpp

Rare hang (~1 in 3000) in grpc when using abseil sync primitives on Windows.

Author: malkiaCreated Apr 21, 2025Updated Aug 7, 2026

Describe the issue

A more detailed issue is here https://github.com/grpc/grpc/issues/39321 and originally here where it was first noticed - https://github.com/open-telemetry/opentelemetry-cpp/issues/3372

Steps to reproduce the problem

A repo with steps is here - https://github.com/malkia/grpc_absl_hang

What version of Abseil are you using?

20240722.0 (found by bazel dep graph)

What operating system and version are you using?

Windows 10, 11

What compiler and version are you using?

Visual Studio Enterprise 2022, 10.0.26100.0 Windows SDK, and MSVC 14.43.34808, e.g.

C:/Program Files/Microsoft Visual Studio/2022/Enterprise/VC/Tools/MSVC/14.43.34808/bin/HostX64/x64/cl.exe

What build system are you using?

bazel 8.2.1

Additional context

No response