QuicConnection.OpenOutboundStreamAsync can hang indefinitely #101233

Closed
#101250
Closed
QuicConnection.OpenOutboundStreamAsync can hang indefinitely#101233
#101250
Assignees
rzikm
Labels
area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
Milestone
8.0.x

Description

@rzikm
rzikm
opened on Apr 18, 2024

When starting a QuicStream, we call MsQuicStreamStart

runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicStream.cs

Lines 238 to 255 in b432fc6

internalValueTaskStartAsync(CancellationTokencancellationToken=default)
{
_startedTcs.TryInitialize(outValueTaskvalueTask,this,cancellationToken);
{
unsafe
{
intstatus=MsQuicApi.Api.StreamStart(
_handle,
QUIC_STREAM_START_FLAGS.SHUTDOWN_ON_FAIL|QUIC_STREAM_START_FLAGS.INDICATE_PEER_ACCEPT);
if(ThrowHelper.TryGetStreamExceptionForMsQuicStatus(status,outException?exception))
{
_startedTcs.TrySetException(exception);
}
}
}
returnvalueTask;
}

TryGetStreamExceptionForMsQuicStatus attempts to classify the status code and behaves accordingly.

runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/ThrowHelper.cs

Lines 30 to 37 in 2984b87

internalstaticboolTryGetStreamExceptionForMsQuicStatus(intstatus,[NotNullWhen(true)]outException?exception)
{
if(status==QUIC_STATUS_ABORTED)
{
// If status == QUIC_STATUS_ABORTED, we will receive an event later, which will complete the task source.
exception=null;
returnfalse;
}

However, MsQuicStreamStart can return QUIC_STATUS_ABORTED, and in this case we will not receive any event because the stream is not considered started.

This may be the cause of some of the "The operation has timed out" CI failures.

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    , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
     blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

    Skip to content
    QuicConnection.OpenOutboundStreamAsync can hang indefinitely #101233
    Closed
    #101250
    Closed
    QuicConnection.OpenOutboundStreamAsync can hang indefinitely#101233
    #101250
    Assignees
    rzikm
    Labels
    area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
    Milestone
    8.0.x
    Description
    @rzikm
    rzikm
    opened on Apr 18, 2024
    When starting a QuicStream, we call MsQuicStreamStart
    runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicStream.cs
    
Lines 238 to 255
in
b432fc6
    internalValueTaskStartAsync(CancellationTokencancellationToken=default)
    {
    _startedTcs.TryInitialize(outValueTaskvalueTask,this,cancellationToken);
    {
     unsafe 
    {
    intstatus=MsQuicApi.Api.StreamStart(
    _handle,
    QUIC_STREAM_START_FLAGS.SHUTDOWN_ON_FAIL|QUIC_STREAM_START_FLAGS.INDICATE_PEER_ACCEPT);
    if(ThrowHelper.TryGetStreamExceptionForMsQuicStatus(status,outException?exception))
    {
    _startedTcs.TrySetException(exception);
    }
    }
    }
    returnvalueTask;
    }
    TryGetStreamExceptionForMsQuicStatus attempts to classify the status code and behaves accordingly.
    runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/ThrowHelper.cs
    
Lines 30 to 37
in
2984b87
    internalstaticboolTryGetStreamExceptionForMsQuicStatus(intstatus,[NotNullWhen(true)]outException?exception)
    {
    if(status==QUIC_STATUS_ABORTED)
    {
    // If status == QUIC_STATUS_ABORTED, we will receive an event later, which will complete the task source.
    exception=null;
    returnfalse;
    }
    However, MsQuicStreamStart can return QUIC_STATUS_ABORTED, and in this case we will not receive any event because the stream is not considered started.
    This may be the cause of some of the "The operation has timed out" CI failures.
    Metadata
    Metadata
    Assignees
    Labels
    area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
    Type
    No type
    Projects
    No projects
      Milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

      Skip to content
      QuicConnection.OpenOutboundStreamAsync can hang indefinitely #101233
      Closed
      #101250
      Closed
      QuicConnection.OpenOutboundStreamAsync can hang indefinitely#101233
      #101250
      Assignees
      rzikm
      Labels
      area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
      Milestone
      8.0.x
      Description
      @rzikm
      rzikm
      opened on Apr 18, 2024
      When starting a QuicStream, we call MsQuicStreamStart
      runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicStream.cs
      
Lines 238 to 255
in
b432fc6
      internalValueTaskStartAsync(CancellationTokencancellationToken=default)
      {
      _startedTcs.TryInitialize(outValueTaskvalueTask,this,cancellationToken);
      {
       unsafe 
      {
      intstatus=MsQuicApi.Api.StreamStart(
      _handle,
      QUIC_STREAM_START_FLAGS.SHUTDOWN_ON_FAIL|QUIC_STREAM_START_FLAGS.INDICATE_PEER_ACCEPT);
      if(ThrowHelper.TryGetStreamExceptionForMsQuicStatus(status,outException?exception))
      {
      _startedTcs.TrySetException(exception);
      }
      }
      }
      returnvalueTask;
      }
      TryGetStreamExceptionForMsQuicStatus attempts to classify the status code and behaves accordingly.
      runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/ThrowHelper.cs
      
Lines 30 to 37
in
2984b87
      internalstaticboolTryGetStreamExceptionForMsQuicStatus(intstatus,[NotNullWhen(true)]outException?exception)
      {
      if(status==QUIC_STATUS_ABORTED)
      {
      // If status == QUIC_STATUS_ABORTED, we will receive an event later, which will complete the task source.
      exception=null;
      returnfalse;
      }
      However, MsQuicStreamStart can return QUIC_STATUS_ABORTED, and in this case we will not receive any event because the stream is not considered started.
      This may be the cause of some of the "The operation has timed out" CI failures.
      Metadata
      Metadata
      Assignees
      Labels
      area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
      Type
      No type
      Projects
      No projects
        Milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

        Skip to content
        QuicConnection.OpenOutboundStreamAsync can hang indefinitely #101233
        Closed
        #101250
        Closed
        QuicConnection.OpenOutboundStreamAsync can hang indefinitely#101233
        #101250
        Assignees
        rzikm
        Labels
        area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
        Milestone
        8.0.x
        Description
        @rzikm
        rzikm
        opened on Apr 18, 2024
        When starting a QuicStream, we call MsQuicStreamStart
        runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicStream.cs
        
Lines 238 to 255
in
b432fc6
        internalValueTaskStartAsync(CancellationTokencancellationToken=default)
        {
        _startedTcs.TryInitialize(outValueTaskvalueTask,this,cancellationToken);
        {
         unsafe 
        {
        intstatus=MsQuicApi.Api.StreamStart(
        _handle,
        QUIC_STREAM_START_FLAGS.SHUTDOWN_ON_FAIL|QUIC_STREAM_START_FLAGS.INDICATE_PEER_ACCEPT);
        if(ThrowHelper.TryGetStreamExceptionForMsQuicStatus(status,outException?exception))
        {
        _startedTcs.TrySetException(exception);
        }
        }
        }
        returnvalueTask;
        }
        TryGetStreamExceptionForMsQuicStatus attempts to classify the status code and behaves accordingly.
        runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/ThrowHelper.cs
        
Lines 30 to 37
in
2984b87
        internalstaticboolTryGetStreamExceptionForMsQuicStatus(intstatus,[NotNullWhen(true)]outException?exception)
        {
        if(status==QUIC_STATUS_ABORTED)
        {
        // If status == QUIC_STATUS_ABORTED, we will receive an event later, which will complete the task source.
        exception=null;
        returnfalse;
        }
        However, MsQuicStreamStart can return QUIC_STATUS_ABORTED, and in this case we will not receive any event because the stream is not considered started.
        This may be the cause of some of the "The operation has timed out" CI failures.
        Metadata
        Metadata
        Assignees
        Labels
        area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
        Type
        No type
        Projects
        No projects
          Milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

          Skip to content
          QuicConnection.OpenOutboundStreamAsync can hang indefinitely #101233
          Closed
          #101250
          Closed
          QuicConnection.OpenOutboundStreamAsync can hang indefinitely#101233
          #101250
          Assignees
          rzikm
          Labels
          area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
          Milestone
          8.0.x
          Description
          @rzikm
          rzikm
          opened on Apr 18, 2024
          When starting a QuicStream, we call MsQuicStreamStart
          runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicStream.cs
          
Lines 238 to 255
in
b432fc6
          internalValueTaskStartAsync(CancellationTokencancellationToken=default)
          {
          _startedTcs.TryInitialize(outValueTaskvalueTask,this,cancellationToken);
          {
           unsafe 
          {
          intstatus=MsQuicApi.Api.StreamStart(
          _handle,
          QUIC_STREAM_START_FLAGS.SHUTDOWN_ON_FAIL|QUIC_STREAM_START_FLAGS.INDICATE_PEER_ACCEPT);
          if(ThrowHelper.TryGetStreamExceptionForMsQuicStatus(status,outException?exception))
          {
          _startedTcs.TrySetException(exception);
          }
          }
          }
          returnvalueTask;
          }
          TryGetStreamExceptionForMsQuicStatus attempts to classify the status code and behaves accordingly.
          runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/ThrowHelper.cs
          
Lines 30 to 37
in
2984b87
          internalstaticboolTryGetStreamExceptionForMsQuicStatus(intstatus,[NotNullWhen(true)]outException?exception)
          {
          if(status==QUIC_STATUS_ABORTED)
          {
          // If status == QUIC_STATUS_ABORTED, we will receive an event later, which will complete the task source.
          exception=null;
          returnfalse;
          }
          However, MsQuicStreamStart can return QUIC_STATUS_ABORTED, and in this case we will not receive any event because the stream is not considered started.
          This may be the cause of some of the "The operation has timed out" CI failures.
          Metadata
          Metadata
          Assignees
          Labels
          area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
          Type
          No type
          Projects
          No projects
            Milestone
            Relationships
            None yet
            Development
            No branches or pull requests
            Issue actions
            
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

            Skip to content
            QuicConnection.OpenOutboundStreamAsync can hang indefinitely #101233
            Closed
            #101250
            Closed
            QuicConnection.OpenOutboundStreamAsync can hang indefinitely#101233
            #101250
            Assignees
            rzikm
            Labels
            area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
            Milestone
            8.0.x
            Description
            @rzikm
            rzikm
            opened on Apr 18, 2024
            When starting a QuicStream, we call MsQuicStreamStart
            runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicStream.cs
            
Lines 238 to 255
in
b432fc6
            internalValueTaskStartAsync(CancellationTokencancellationToken=default)
            {
            _startedTcs.TryInitialize(outValueTaskvalueTask,this,cancellationToken);
            {
             unsafe 
            {
            intstatus=MsQuicApi.Api.StreamStart(
            _handle,
            QUIC_STREAM_START_FLAGS.SHUTDOWN_ON_FAIL|QUIC_STREAM_START_FLAGS.INDICATE_PEER_ACCEPT);
            if(ThrowHelper.TryGetStreamExceptionForMsQuicStatus(status,outException?exception))
            {
            _startedTcs.TrySetException(exception);
            }
            }
            }
            returnvalueTask;
            }
            TryGetStreamExceptionForMsQuicStatus attempts to classify the status code and behaves accordingly.
            runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/ThrowHelper.cs
            
Lines 30 to 37
in
2984b87
            internalstaticboolTryGetStreamExceptionForMsQuicStatus(intstatus,[NotNullWhen(true)]outException?exception)
            {
            if(status==QUIC_STATUS_ABORTED)
            {
            // If status == QUIC_STATUS_ABORTED, we will receive an event later, which will complete the task source.
            exception=null;
            returnfalse;
            }
            However, MsQuicStreamStart can return QUIC_STATUS_ABORTED, and in this case we will not receive any event because the stream is not considered started.
            This may be the cause of some of the "The operation has timed out" CI failures.
            Metadata
            Metadata
            Assignees
            Labels
            area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
            Type
            No type
            Projects
            No projects
              Milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              QuicConnection.OpenOutboundStreamAsync can hang indefinitely #101233
              Closed
              #101250
              Closed
              QuicConnection.OpenOutboundStreamAsync can hang indefinitely#101233
              #101250
              Assignees
              rzikm
              Labels
              area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
              Milestone
              8.0.x
              Description
              @rzikm
              rzikm
              opened on Apr 18, 2024
              When starting a QuicStream, we call MsQuicStreamStart
              runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicStream.cs
              
Lines 238 to 255
in
b432fc6
              internalValueTaskStartAsync(CancellationTokencancellationToken=default)
              {
              _startedTcs.TryInitialize(outValueTaskvalueTask,this,cancellationToken);
              {
               unsafe 
              {
              intstatus=MsQuicApi.Api.StreamStart(
              _handle,
              QUIC_STREAM_START_FLAGS.SHUTDOWN_ON_FAIL|QUIC_STREAM_START_FLAGS.INDICATE_PEER_ACCEPT);
              if(ThrowHelper.TryGetStreamExceptionForMsQuicStatus(status,outException?exception))
              {
              _startedTcs.TrySetException(exception);
              }
              }
              }
              returnvalueTask;
              }
              TryGetStreamExceptionForMsQuicStatus attempts to classify the status code and behaves accordingly.
              runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/ThrowHelper.cs
              
Lines 30 to 37
in
2984b87
              internalstaticboolTryGetStreamExceptionForMsQuicStatus(intstatus,[NotNullWhen(true)]outException?exception)
              {
              if(status==QUIC_STATUS_ABORTED)
              {
              // If status == QUIC_STATUS_ABORTED, we will receive an event later, which will complete the task source.
              exception=null;
              returnfalse;
              }
              However, MsQuicStreamStart can return QUIC_STATUS_ABORTED, and in this case we will not receive any event because the stream is not considered started.
              This may be the cause of some of the "The operation has timed out" CI failures.
              Metadata
              Metadata
              Assignees
              Labels
              area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
              Type
              No type
              Projects
              No projects
                Milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                Skip to content
                QuicConnection.OpenOutboundStreamAsync can hang indefinitely #101233
                Closed
                #101250
                Closed
                QuicConnection.OpenOutboundStreamAsync can hang indefinitely#101233
                #101250
                Assignees
                rzikm
                Labels
                area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
                Milestone
                8.0.x
                Description
                @rzikm
                rzikm
                opened on Apr 18, 2024
                When starting a QuicStream, we call MsQuicStreamStart
                runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicStream.cs
                
Lines 238 to 255
in
b432fc6
                internalValueTaskStartAsync(CancellationTokencancellationToken=default)
                {
                _startedTcs.TryInitialize(outValueTaskvalueTask,this,cancellationToken);
                {
                 unsafe 
                {
                intstatus=MsQuicApi.Api.StreamStart(
                _handle,
                QUIC_STREAM_START_FLAGS.SHUTDOWN_ON_FAIL|QUIC_STREAM_START_FLAGS.INDICATE_PEER_ACCEPT);
                if(ThrowHelper.TryGetStreamExceptionForMsQuicStatus(status,outException?exception))
                {
                _startedTcs.TrySetException(exception);
                }
                }
                }
                returnvalueTask;
                }
                TryGetStreamExceptionForMsQuicStatus attempts to classify the status code and behaves accordingly.
                runtime/src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/ThrowHelper.cs
                
Lines 30 to 37
in
2984b87
                internalstaticboolTryGetStreamExceptionForMsQuicStatus(intstatus,[NotNullWhen(true)]outException?exception)
                {
                if(status==QUIC_STATUS_ABORTED)
                {
                // If status == QUIC_STATUS_ABORTED, we will receive an event later, which will complete the task source.
                exception=null;
                returnfalse;
                }
                However, MsQuicStreamStart can return QUIC_STATUS_ABORTED, and in this case we will not receive any event because the stream is not considered started.
                This may be the cause of some of the "The operation has timed out" CI failures.
                Metadata
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                area-System.Net.Quictenet-reliabilityReliability/stability related issue (stress, load problems, etc.)
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