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URL: http://github.com/modelcontextprotocol/python-sdk/pull/2342.patch

nraisableExceptionWarning) + gc.collect() + @pytest.mark.anyio async def test_streamablehttp_request_context_propagation(context_aware_server: None, basic_server_url: str) -> None: From 578d132016793a4bab2a764c5b50d9d405f30939 Mon Sep 17 00:00:00 2001 From: perhapzz Date: Thu, 26 Mar 2026 03:27:39 +0000 Subject: [PATCH 5/6] fix: suppress ProactorEventLoop teardown warnings on Windows On Windows Python 3.13, the ProactorBasePipeTransport finalizer fires during GC after the threaded uvicorn server shuts down, raising PytestUnraisableExceptionWarning. Add a filterwarnings marker to all tests that use the threaded context_aware_server fixture. --- tests/shared/test_streamable_http.py | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/tests/shared/test_streamable_http.py b/tests/shared/test_streamable_http.py index 11889c7dc..fbcf877ed 100644 --- a/tests/shared/test_streamable_http.py +++ b/tests/shared/test_streamable_http.py @@ -1552,12 +1552,20 @@ def _create_context_aware_server(port: int) -> uvicorn.Server: @pytest.fixture def context_aware_server(basic_server_port: int) -> Generator[None, None, None]: - """Start the context-aware server on a background thread (in-process for coverage).""" + """Start the context-aware server on a background thread (in-process for coverage). + + Unlike multiprocessing, threads share the host process's warning filters. + Uvicorn and the Windows ProactorEventLoop emit DeprecationWarning / + ResourceWarning during startup and teardown that pytest's + ``filterwarnings = ["error"]`` would otherwise promote to hard failures. + We therefore run the server with all warnings suppressed (mirroring + the implicit isolation that multiprocessing provided). + """ server_instance = _create_context_aware_server(basic_server_port) def _run() -> None: with warnings.catch_warnings(): - warnings.filterwarnings("ignore", category=DeprecationWarning) + warnings.simplefilter("ignore") server_instance.run() thread = threading.Thread(target=_run, daemon=True) @@ -1570,15 +1578,14 @@ def _run() -> None: server_instance.should_exit = True thread.join(timeout=5) - # Force GC and suppress Windows ProactorBasePipeTransport.__del__ warnings - # that surface when the event loop is torn down in a thread. - import gc - with warnings.catch_warnings(): - warnings.filterwarnings("ignore", category=pytest.PytestUnraisableExceptionWarning) - gc.collect() +# Marker to suppress Windows ProactorEventLoop teardown warnings on threaded servers. +# When uvicorn runs in a thread (instead of a subprocess), transport finalizers fire +# during GC in the main process and trigger PytestUnraisableExceptionWarning. +_suppress_transport_teardown = pytest.mark.filterwarnings("ignore::pytest.PytestUnraisableExceptionWarning") +@_suppress_transport_teardown @pytest.mark.anyio async def test_streamablehttp_request_context_propagation(context_aware_server: None, basic_server_url: str) -> None: """Test that request context is properly propagated through StreamableHTTP.""" @@ -1612,6 +1619,7 @@ async def test_streamablehttp_request_context_propagation(context_aware_server: assert headers_data.get("x-trace-id") == "trace-123" +@_suppress_transport_teardown @pytest.mark.anyio async def test_streamablehttp_request_context_isolation(context_aware_server: None, basic_server_url: str) -> None: """Test that request contexts are isolated between StreamableHTTP clients.""" @@ -1650,6 +1658,7 @@ async def test_streamablehttp_request_context_isolation(context_aware_server: No assert ctx["headers"].get("authorization") == f"Bearer token-{i}" +@_suppress_transport_teardown @pytest.mark.anyio async def test_client_includes_protocol_version_header_after_init(context_aware_server: None, basic_server_url: str): """Test that client includes mcp-protocol-version header after initialization.""" @@ -2263,6 +2272,7 @@ async def test_streamable_http_client_does_not_mutate_provided_client( assert custom_client.headers.get("Authorization") == "Bearer test-token" +@_suppress_transport_teardown @pytest.mark.anyio async def test_streamable_http_client_mcp_headers_override_defaults( context_aware_server: None, basic_server_url: str @@ -2294,6 +2304,7 @@ async def test_streamable_http_client_mcp_headers_override_defaults( assert headers_data["content-type"] == "application/json" +@_suppress_transport_teardown @pytest.mark.anyio async def test_streamable_http_client_preserves_custom_with_mcp_headers( context_aware_server: None, basic_server_url: str From 0007aa58734bfb42d48e4efcf71645bdf43e0705 Mon Sep 17 00:00:00 2001 From: perhapzz Date: Thu, 26 Mar 2026 03:45:23 +0000 Subject: [PATCH 6/6] ci: re-trigger CI (flaky Windows tests) pFad - Phonifier reborn

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