fix: handle missing parent modules in _has_module - #49035
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Gentle ping for maintainer review. The current |
Catch ModuleNotFoundError from importlib.util.find_spec() when a parent optional dependency package is absent, so optional feature probes return False instead of crashing. Add regression coverage for the missing-parent-package case and mark the pure import_utils test module to skip unrelated global accelerator cleanup. Co-authored-by: GitHub Copilot <175728472+github-copilot[bot]@users.noreply.github.com> Signed-off-by: shuhao zhang <shuhao_zhang@hust.edu.cn> (cherry picked from commit 737fe1386ad8df5b14b9c01bf3146253d24fa229)
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Problem
importlib.util.find_spec()can raiseModuleNotFoundErrorfor a dotted optional dependency when its parent package is absent._has_module()should report that dependency as unavailable instead of failing the caller.Fix
Catch
ModuleNotFoundErroronly around the specification lookup and returnFalse. Keep the existing warning behavior for exceptions raised while importing a module whose spec exists.Validation
ruff check vllm/utils/import_utils.py tests/utils_/test_import_utils.pyruff format --check vllm/utils/import_utils.py tests/utils_/test_import_utils.pypython3 -m compileall -q vllm/utils/import_utils.py tests/utils_/test_import_utils.pyThis is an optional-dependency correctness fix and makes no performance claim.\n\n### Current-head validation (2026-07-26)\n\n- Rebased onto upstream
main0ba2aa35a81dcc3246b26291368b53fa2389c7d7.\n- Exact PR head:ecfb38de74b91079599922aca2c6d0e5bea01f2e.\n-TestHasModule: 5 passed with backend auto-loading disabled; the only full-file failure was the source-checkout metadata expectation outside this change.\n- Ruff check, Ruff format check, andgit diff --checkpassed.\n\n\n## Contribution disclosure