sjr666666 2fe325f8ae

fix(lark): retry the Windows install lock instead of failing after ~10s (#6881) ...

* fix(lark): retry the Windows install lock instead of failing after ~10s

msvcrt.LK_LOCK gives up after roughly ten seconds and surfaces contention
as Permission denied, while a real install (download + setup of the
lark/sandbox CLI) can hold the lock far longer. Retry the non-blocking
acquisition on the Windows fallback branch so concurrent Gateway workers
serialize instead of failing, mirroring the extensions manager's lock
introduced in #6020. The POSIX flock branch is unchanged.

Closes #6879

* test(lark): inject msvcrt stub with raising=False for Linux runners

The regression test patches the module-level ``msvcrt`` attribute, which only
exists on Windows (the POSIX branch imports ``fcntl`` instead), so
``monkeypatch.setattr`` with the default ``raising=True`` raised AttributeError
on Linux CI (backend-unit-tests shard 4).

Pass ``raising=False`` so the stub is injected on POSIX runners: ``fcntl`` is
patched to ``None`` first, and ``_exclusive_install_lock`` then takes the
Windows fallback branch against the fake. Windows behavior is unchanged.

Scope: backend/tests/test_lark_cli_install_lock.py, 1 line.
Verification: pytest tests/test_lark_cli_install_lock.py on Windows
(Python 3.12, pytest 9.0.3) -- 3 passed incl. the real-contention case;
Linux CI rerun is the authoritative check.

* fix(lark): harden and share advisory lock retries

---------

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

2026-10-15 08:03:10 +08:00

..

extension-api

feat(extensions): allow ModelTool plugins to return structured artifacts (#6861)

2026-10-14 17:24:32 +08:00

harness

fix(lark): retry the Windows install lock instead of failing after ~10s (#6881)

2026-10-15 08:03:10 +08:00