') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ', 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ', 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ', 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); })(); CI failure on Windows: Connection aborted in SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds · Issue #132004 · dotnet/runtime · GitHub
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CI failure on Windows: Connection aborted in SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds #132004

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CI failure on Windows: Connection aborted in SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds#132004
Labels
Known Build ErrorUse this to report build issues in the .NET Helix tabarea-System.Net.Httpblocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'
Milestone
12.0.0

Description

@svick
svick
opened on Aug 7, 2026

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1542869
Build error leg or test failing: System.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds
Pull request: https://github.com/dotnet/runtime.git/pull/131876

Error Message

DO NOT USE JSON BELOW IF THIS IS A BUILD BREAK otherwise build analysis will allow pull requests to merge that break the build worse. For a build break, do not use this issue form. Make a regular new issue.

Fill the error message using step by step known issues guidance.

{
"ErrorMessage": ["SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds", "SocketException : An established connection was aborted by the software in your host machine."],
"BuildRetry": false,
"ExcludeConsoleLog": false
}
 System.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds(safeChar: 0x007f, headerType: Content) [FAIL]
System.Net.Http.HttpRequestException : An error occurred while sending the request.
---- System.IO.IOException : Unable to read data from the transport connection: An established connection was aborted by the software in your host machine..
-------- System.Net.Sockets.SocketException : An established connection was aborted by the software in your host machine.
Stack Trace:
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnection.cs(902,0): at System.Net.Http.HttpConnection.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
/_/src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncHelpers.CoreCLR.cs(725,0): at System.Runtime.CompilerServices.AsyncHelpers.TransparentAwait[T](Task`1 task)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs(389,0): at System.Net.Http.HttpConnectionPool.SendWithNtConnectionAuthAsync(HttpConnection connection, HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs(501,0): at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
/_/src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/RuntimeAsyncTaskContinuation.cs(139,0): at System.Runtime.CompilerServices.RuntimeAsyncTaskContinuation.GetResult[T](Task task, Byte& result)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/RedirectHandler.cs(29,0): at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpMessageHandlerStage.cs(21,0): at System.Net.Http.HttpMessageHandlerStage.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/SocketsHttpHandler.cs(668,0): at System.Net.Http.SocketsHttpHandler.<SendAsync>g__CreateHandlerAndSendAsync|119_0(HttpRequestMessage request, CancellationToken cancellationToken)
/_/src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/RuntimeAsyncTaskContinuation.cs(139,0): at System.Runtime.CompilerServices.RuntimeAsyncTaskContinuation.GetResult[T](Task task, Byte& result)
/_/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs(544,0): at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
/_/src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/RuntimeAsyncTaskContinuation.cs(139,0): at System.Runtime.CompilerServices.RuntimeAsyncTaskContinuation.GetResult[T](Task task, Byte& result)
/_/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs(518,0): at System.Net.Http.HttpClient.SendAsync(HttpRequestMessage request)
/_/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.cs(2276,0): at System.Net.Http.Functional.Tests.HttpClientHandlerTest.<>c__DisplayClass54_0.<SendAsync_RequestWithLatin1HeaderValue_Succeeds>b__0(Uri uri)
/_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs(119,0): at System.Threading.Tasks.TaskTimeoutExtensions.GetRealException(Task task)
--- End of stack trace from previous location ---
/_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs(89,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks)
/_/src/libraries/Common/tests/System/Net/Http/GenericLoopbackServer.cs(44,0): at System.Net.Test.Common.LoopbackServerFactory.<>c__DisplayClass6_0.<CreateClientAndServerAsync>b__0(GenericLoopbackServer server, Uri uri)
/_/src/libraries/Common/tests/System/Net/Http/LoopbackServer.cs(107,0): at System.Net.Test.Common.LoopbackServer.CreateServerAsync(Func`2 funcAsync, Options options)
/_/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.cs(2251,0): at System.Net.Http.Functional.Tests.HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds(Char safeChar, HeaderType headerType)
--- End of stack trace from previous location ---
----- Inner Stack Trace -----
/_/src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncHelpers.CoreCLR.cs(739,0): at System.Runtime.CompilerServices.AsyncHelpers.TransparentAwait[T](ValueTask`1 task)
/_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/NetworkStream.cs(607,0): at System.Net.Sockets.NetworkStream.ReadAsync(Memory`1 buffer, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnection.cs(1655,0): at System.Net.Http.HttpConnection.InitialFillAsync(Boolean async)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnection.cs(650,0): at System.Net.Http.HttpConnection.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
----- Inner Stack Trace -----
/_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Tasks.cs(1374,0): at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.CreateException(SocketError error, Boolean forAsyncThrow)
/_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Tasks.cs(1056,0): at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ReceiveAsync(Socket socket, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Tasks.cs(305,0): at System.Net.Sockets.Socket.ReceiveAsync(Memory`1 buffer, SocketFlags socketFlags, Boolean fromNetworkStream, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/NetworkStream.cs(597,0): at System.Net.Sockets.NetworkStream.ReadAsync(Memory`1 buffer, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnection.cs(1655,0): at System.Net.Http.HttpConnection.InitialFillAsync(Boolean async)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnection.cs(650,0): at System.Net.Http.HttpConnection.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs(398,0): at System.Net.Http.HttpConnectionPool.SendWithNtProxyAuthAsync(HttpConnection connection, HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs(388,0): at System.Net.Http.HttpConnectionPool.SendWithNtConnectionAuthAsync(HttpConnection connection, HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
/_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs(501,0): at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
/_/src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs(3636,0): at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
/_/src/libraries/System.Private.CoreLib/src/System/Threading/ThreadPoolWorkQueue.cs(960,0): at System.Threading.ThreadPoolWorkQueue.Dispatch()
/_/src/libraries/System.Private.CoreLib/src/System/Threading/PortableThreadPool.WorkerThread.cs(137,0): at System.Threading.PortableThreadPool.WorkerThread.WorkerDoWork(PortableThreadPool threadPoolInstance)
/_/src/libraries/System.Private.CoreLib/src/System/Threading/PortableThreadPool.WorkerThread.cs(110,0): at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
/_/src/coreclr/System.Private.CoreLib/src/System/Threading/Thread.CoreCLR.cs(117,0): at System.Threading.Thread.StartCallback(Thread* pThread)
--- End of stack trace from previous location ---

This is similar to #130458

Known issue validation

Build: 🔎https://dev.azure.com/dnceng-public/public/_build/results?buildId=1542869
Error message validated:[SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds SocketException : An established connection was aborted by the software in your host machine.]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 8/7/2026 1:52:53 PM UTC

Report

BuildRepositoryTestPull Request
1549428dotnet/runtimeSystem.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds#132035
1549388dotnet/runtimeSystem.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds#132189
1547144dotnet/runtimeSystem.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds#132077
1542869dotnet/runtimeSystem.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.SendAsync_RequestWithLatin1HeaderValue_Succeeds#131876

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