gh-140947: fix contextvars handling for server tasks in asyncio by kumaraditya303 · Pull Request #141158 · python/cpython
CuriousLearner added a commit to CuriousLearner/cpython that referenced this pull request
Kludex added a commit to Kludex/uvicorn that referenced this pull request
Reintroduces the behavior from #2742 as an opt-in flag. When set, each ASGI request runs in a fresh contextvars.Context, which works around the asyncio context leak in python/cpython#140947 (expected to be fixed upstream for Python >=3.15 via python/cpython#141158). Default is off so context set in the lifespan or by external instrumentation (e.g. OpenTelemetry eBPF propagation) remains visible to ASGI handlers.
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