Skip flaky FileConfigurationProvider test on .NET Framework - #126874

Merged
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout
Apr 15, 2026
Merged

Skip flaky FileConfigurationProvider test on .NET Framework#126874
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout

Conversation

@svick

@svicksvick commented Apr 14, 2026

Copy link
Copy Markdown
Member

Note

This PR was AI/Copilot-generated.

Fixes#126787

Problem

The ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test introduced in #126411 is flaky on the net481-windows-Release-x86 CI leg, causing it to time out and block CI.

Root cause

FileSystemWatcher on .NET Framework drops directory creation events under I/O contention. The PendingCreationWatcher in PhysicalFilesWatcher relies on FSW to detect when a missing root directory is created. When the FSW event is lost, the change token never fires and the test hangs.

This was verified by:

  1. Reproducing locally — running the test in parallel (4-8 concurrent dotnet test processes) reproduces the hang on net481 x86 (~3% failure rate).
  2. Isolating to raw FSW — a minimal test using only FileSystemWatcher (no PendingCreationWatcher) also fails under the same conditions on .NET Framework.
  3. Confirming .NET is unaffected — 504 runs on net11.0 x86 with 8 concurrent threads produced 0 failures.

All 7 CI failures in the issue report are on the same net481-windows-Release-x86-NET481_Release-Windows.10.Amd64.Client.Open configuration.

Changes

  • Skip on .NET Framework: Changed [Fact] to [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotNetFramework))] since the test depends on FSW reliability that .NET Framework cannot guarantee under load.
  • Improved timeout: Replaced CancellationTokenSource-based timeout with Task.WaitAsync(TimeSpan) (via TaskTimeoutExtensions polyfill) and added TaskCreationOptions.RunContinuationsAsynchronously — matching the pattern used by all similar tests in PhysicalFilesWatcherTests.

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

This PR addresses CI flakiness in Microsoft.Extensions.Configuration.FileExtensions tests by skipping a FileSystemWatcher-dependent integration test on .NET Framework and aligning the test’s timeout/waiting pattern with existing watcher tests.

Changes:

  • Skip ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated on .NET Framework via ConditionalFact(... IsNotNetFramework).
  • Replace CTS-based timeout logic with Task.WaitAsync(TimeSpan) and RunContinuationsAsynchronously for the TCS.
  • Add the shared TaskTimeoutExtensions polyfill to the test project to support WaitAsync on TFMs that lack it.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

FileDescription
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/Microsoft.Extensions.Configuration.FileExtensions.Tests.csprojAdds shared TaskTimeoutExtensions to enable WaitAsync in this test assembly.
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/FileConfigurationProviderTest.csSkips the flaky test on .NET Framework and updates the wait/timeout implementation for the change token.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
CopilotAI review requested due to automatic review settings April 14, 2026 11:57

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

@dotnet-policy-service

Copy link
Copy Markdown
Contributor

Tagging subscribers to this area: @dotnet/area-extensions-filesystem
See info in area-owners.md if you want to be subscribed.

@rosebyterosebyte left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Tarek's comment looks reasonable, please consider it before merging..

@adamsitnikadamsitnik left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM, I am going to allow myself to merge it so the CI is in better shape. Thank you @svick !

@adamsitnik
adamsitnik enabled auto-merge (squash) April 15, 2026 13:49
@adamsitnik
adamsitnik merged commit 3024b5a into dotnet:mainApr 15, 2026
103 of 108 checks passed
@svick
svick deleted the tokenfireswhenfilecreated-ci-timeout branch April 15, 2026 13:52
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 17, 2026
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test timing out in CI

6 participants

@svick@adamsitnik@jkotas@tarekgh@rosebyte
, '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

Skip flaky FileConfigurationProvider test on .NET Framework - #126874

Merged
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout
Apr 15, 2026
Merged

Skip flaky FileConfigurationProvider test on .NET Framework#126874
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout

Conversation

@svick

@svicksvick commented Apr 14, 2026

Copy link
Copy Markdown
Member

Note

This PR was AI/Copilot-generated.

Fixes#126787

Problem

The ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test introduced in #126411 is flaky on the net481-windows-Release-x86 CI leg, causing it to time out and block CI.

Root cause

FileSystemWatcher on .NET Framework drops directory creation events under I/O contention. The PendingCreationWatcher in PhysicalFilesWatcher relies on FSW to detect when a missing root directory is created. When the FSW event is lost, the change token never fires and the test hangs.

This was verified by:

  1. Reproducing locally — running the test in parallel (4-8 concurrent dotnet test processes) reproduces the hang on net481 x86 (~3% failure rate).
  2. Isolating to raw FSW — a minimal test using only FileSystemWatcher (no PendingCreationWatcher) also fails under the same conditions on .NET Framework.
  3. Confirming .NET is unaffected — 504 runs on net11.0 x86 with 8 concurrent threads produced 0 failures.

All 7 CI failures in the issue report are on the same net481-windows-Release-x86-NET481_Release-Windows.10.Amd64.Client.Open configuration.

Changes

  • Skip on .NET Framework: Changed [Fact] to [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotNetFramework))] since the test depends on FSW reliability that .NET Framework cannot guarantee under load.
  • Improved timeout: Replaced CancellationTokenSource-based timeout with Task.WaitAsync(TimeSpan) (via TaskTimeoutExtensions polyfill) and added TaskCreationOptions.RunContinuationsAsynchronously — matching the pattern used by all similar tests in PhysicalFilesWatcherTests.

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

This PR addresses CI flakiness in Microsoft.Extensions.Configuration.FileExtensions tests by skipping a FileSystemWatcher-dependent integration test on .NET Framework and aligning the test’s timeout/waiting pattern with existing watcher tests.

Changes:

  • Skip ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated on .NET Framework via ConditionalFact(... IsNotNetFramework).
  • Replace CTS-based timeout logic with Task.WaitAsync(TimeSpan) and RunContinuationsAsynchronously for the TCS.
  • Add the shared TaskTimeoutExtensions polyfill to the test project to support WaitAsync on TFMs that lack it.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

FileDescription
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/Microsoft.Extensions.Configuration.FileExtensions.Tests.csprojAdds shared TaskTimeoutExtensions to enable WaitAsync in this test assembly.
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/FileConfigurationProviderTest.csSkips the flaky test on .NET Framework and updates the wait/timeout implementation for the change token.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
CopilotAI review requested due to automatic review settings April 14, 2026 11:57

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

@dotnet-policy-service

Copy link
Copy Markdown
Contributor

Tagging subscribers to this area: @dotnet/area-extensions-filesystem
See info in area-owners.md if you want to be subscribed.

@rosebyterosebyte left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Tarek's comment looks reasonable, please consider it before merging..

@adamsitnikadamsitnik left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM, I am going to allow myself to merge it so the CI is in better shape. Thank you @svick !

@adamsitnik
adamsitnik enabled auto-merge (squash) April 15, 2026 13:49
@adamsitnik
adamsitnik merged commit 3024b5a into dotnet:mainApr 15, 2026
103 of 108 checks passed
@svick
svick deleted the tokenfireswhenfilecreated-ci-timeout branch April 15, 2026 13:52
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 17, 2026
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test timing out in CI

6 participants

@svick@adamsitnik@jkotas@tarekgh@rosebyte
, '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

Skip flaky FileConfigurationProvider test on .NET Framework - #126874

Merged
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout
Apr 15, 2026
Merged

Skip flaky FileConfigurationProvider test on .NET Framework#126874
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout

Conversation

@svick

@svicksvick commented Apr 14, 2026

Copy link
Copy Markdown
Member

Note

This PR was AI/Copilot-generated.

Fixes#126787

Problem

The ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test introduced in #126411 is flaky on the net481-windows-Release-x86 CI leg, causing it to time out and block CI.

Root cause

FileSystemWatcher on .NET Framework drops directory creation events under I/O contention. The PendingCreationWatcher in PhysicalFilesWatcher relies on FSW to detect when a missing root directory is created. When the FSW event is lost, the change token never fires and the test hangs.

This was verified by:

  1. Reproducing locally — running the test in parallel (4-8 concurrent dotnet test processes) reproduces the hang on net481 x86 (~3% failure rate).
  2. Isolating to raw FSW — a minimal test using only FileSystemWatcher (no PendingCreationWatcher) also fails under the same conditions on .NET Framework.
  3. Confirming .NET is unaffected — 504 runs on net11.0 x86 with 8 concurrent threads produced 0 failures.

All 7 CI failures in the issue report are on the same net481-windows-Release-x86-NET481_Release-Windows.10.Amd64.Client.Open configuration.

Changes

  • Skip on .NET Framework: Changed [Fact] to [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotNetFramework))] since the test depends on FSW reliability that .NET Framework cannot guarantee under load.
  • Improved timeout: Replaced CancellationTokenSource-based timeout with Task.WaitAsync(TimeSpan) (via TaskTimeoutExtensions polyfill) and added TaskCreationOptions.RunContinuationsAsynchronously — matching the pattern used by all similar tests in PhysicalFilesWatcherTests.

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

This PR addresses CI flakiness in Microsoft.Extensions.Configuration.FileExtensions tests by skipping a FileSystemWatcher-dependent integration test on .NET Framework and aligning the test’s timeout/waiting pattern with existing watcher tests.

Changes:

  • Skip ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated on .NET Framework via ConditionalFact(... IsNotNetFramework).
  • Replace CTS-based timeout logic with Task.WaitAsync(TimeSpan) and RunContinuationsAsynchronously for the TCS.
  • Add the shared TaskTimeoutExtensions polyfill to the test project to support WaitAsync on TFMs that lack it.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

FileDescription
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/Microsoft.Extensions.Configuration.FileExtensions.Tests.csprojAdds shared TaskTimeoutExtensions to enable WaitAsync in this test assembly.
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/FileConfigurationProviderTest.csSkips the flaky test on .NET Framework and updates the wait/timeout implementation for the change token.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
CopilotAI review requested due to automatic review settings April 14, 2026 11:57

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

@dotnet-policy-service

Copy link
Copy Markdown
Contributor

Tagging subscribers to this area: @dotnet/area-extensions-filesystem
See info in area-owners.md if you want to be subscribed.

@rosebyterosebyte left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Tarek's comment looks reasonable, please consider it before merging..

@adamsitnikadamsitnik left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM, I am going to allow myself to merge it so the CI is in better shape. Thank you @svick !

@adamsitnik
adamsitnik enabled auto-merge (squash) April 15, 2026 13:49
@adamsitnik
adamsitnik merged commit 3024b5a into dotnet:mainApr 15, 2026
103 of 108 checks passed
@svick
svick deleted the tokenfireswhenfilecreated-ci-timeout branch April 15, 2026 13:52
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 17, 2026
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test timing out in CI

6 participants

@svick@adamsitnik@jkotas@tarekgh@rosebyte
, '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

Skip flaky FileConfigurationProvider test on .NET Framework - #126874

Merged
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout
Apr 15, 2026
Merged

Skip flaky FileConfigurationProvider test on .NET Framework#126874
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout

Conversation

@svick

@svicksvick commented Apr 14, 2026

Copy link
Copy Markdown
Member

Note

This PR was AI/Copilot-generated.

Fixes#126787

Problem

The ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test introduced in #126411 is flaky on the net481-windows-Release-x86 CI leg, causing it to time out and block CI.

Root cause

FileSystemWatcher on .NET Framework drops directory creation events under I/O contention. The PendingCreationWatcher in PhysicalFilesWatcher relies on FSW to detect when a missing root directory is created. When the FSW event is lost, the change token never fires and the test hangs.

This was verified by:

  1. Reproducing locally — running the test in parallel (4-8 concurrent dotnet test processes) reproduces the hang on net481 x86 (~3% failure rate).
  2. Isolating to raw FSW — a minimal test using only FileSystemWatcher (no PendingCreationWatcher) also fails under the same conditions on .NET Framework.
  3. Confirming .NET is unaffected — 504 runs on net11.0 x86 with 8 concurrent threads produced 0 failures.

All 7 CI failures in the issue report are on the same net481-windows-Release-x86-NET481_Release-Windows.10.Amd64.Client.Open configuration.

Changes

  • Skip on .NET Framework: Changed [Fact] to [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotNetFramework))] since the test depends on FSW reliability that .NET Framework cannot guarantee under load.
  • Improved timeout: Replaced CancellationTokenSource-based timeout with Task.WaitAsync(TimeSpan) (via TaskTimeoutExtensions polyfill) and added TaskCreationOptions.RunContinuationsAsynchronously — matching the pattern used by all similar tests in PhysicalFilesWatcherTests.

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

This PR addresses CI flakiness in Microsoft.Extensions.Configuration.FileExtensions tests by skipping a FileSystemWatcher-dependent integration test on .NET Framework and aligning the test’s timeout/waiting pattern with existing watcher tests.

Changes:

  • Skip ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated on .NET Framework via ConditionalFact(... IsNotNetFramework).
  • Replace CTS-based timeout logic with Task.WaitAsync(TimeSpan) and RunContinuationsAsynchronously for the TCS.
  • Add the shared TaskTimeoutExtensions polyfill to the test project to support WaitAsync on TFMs that lack it.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

FileDescription
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/Microsoft.Extensions.Configuration.FileExtensions.Tests.csprojAdds shared TaskTimeoutExtensions to enable WaitAsync in this test assembly.
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/FileConfigurationProviderTest.csSkips the flaky test on .NET Framework and updates the wait/timeout implementation for the change token.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
CopilotAI review requested due to automatic review settings April 14, 2026 11:57

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

@dotnet-policy-service

Copy link
Copy Markdown
Contributor

Tagging subscribers to this area: @dotnet/area-extensions-filesystem
See info in area-owners.md if you want to be subscribed.

@rosebyterosebyte left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Tarek's comment looks reasonable, please consider it before merging..

@adamsitnikadamsitnik left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM, I am going to allow myself to merge it so the CI is in better shape. Thank you @svick !

@adamsitnik
adamsitnik enabled auto-merge (squash) April 15, 2026 13:49
@adamsitnik
adamsitnik merged commit 3024b5a into dotnet:mainApr 15, 2026
103 of 108 checks passed
@svick
svick deleted the tokenfireswhenfilecreated-ci-timeout branch April 15, 2026 13:52
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 17, 2026
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test timing out in CI

6 participants

@svick@adamsitnik@jkotas@tarekgh@rosebyte
, '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

Skip flaky FileConfigurationProvider test on .NET Framework - #126874

Merged
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout
Apr 15, 2026
Merged

Skip flaky FileConfigurationProvider test on .NET Framework#126874
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout

Conversation

@svick

@svicksvick commented Apr 14, 2026

Copy link
Copy Markdown
Member

Note

This PR was AI/Copilot-generated.

Fixes#126787

Problem

The ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test introduced in #126411 is flaky on the net481-windows-Release-x86 CI leg, causing it to time out and block CI.

Root cause

FileSystemWatcher on .NET Framework drops directory creation events under I/O contention. The PendingCreationWatcher in PhysicalFilesWatcher relies on FSW to detect when a missing root directory is created. When the FSW event is lost, the change token never fires and the test hangs.

This was verified by:

  1. Reproducing locally — running the test in parallel (4-8 concurrent dotnet test processes) reproduces the hang on net481 x86 (~3% failure rate).
  2. Isolating to raw FSW — a minimal test using only FileSystemWatcher (no PendingCreationWatcher) also fails under the same conditions on .NET Framework.
  3. Confirming .NET is unaffected — 504 runs on net11.0 x86 with 8 concurrent threads produced 0 failures.

All 7 CI failures in the issue report are on the same net481-windows-Release-x86-NET481_Release-Windows.10.Amd64.Client.Open configuration.

Changes

  • Skip on .NET Framework: Changed [Fact] to [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotNetFramework))] since the test depends on FSW reliability that .NET Framework cannot guarantee under load.
  • Improved timeout: Replaced CancellationTokenSource-based timeout with Task.WaitAsync(TimeSpan) (via TaskTimeoutExtensions polyfill) and added TaskCreationOptions.RunContinuationsAsynchronously — matching the pattern used by all similar tests in PhysicalFilesWatcherTests.

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

This PR addresses CI flakiness in Microsoft.Extensions.Configuration.FileExtensions tests by skipping a FileSystemWatcher-dependent integration test on .NET Framework and aligning the test’s timeout/waiting pattern with existing watcher tests.

Changes:

  • Skip ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated on .NET Framework via ConditionalFact(... IsNotNetFramework).
  • Replace CTS-based timeout logic with Task.WaitAsync(TimeSpan) and RunContinuationsAsynchronously for the TCS.
  • Add the shared TaskTimeoutExtensions polyfill to the test project to support WaitAsync on TFMs that lack it.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

FileDescription
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/Microsoft.Extensions.Configuration.FileExtensions.Tests.csprojAdds shared TaskTimeoutExtensions to enable WaitAsync in this test assembly.
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/FileConfigurationProviderTest.csSkips the flaky test on .NET Framework and updates the wait/timeout implementation for the change token.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
CopilotAI review requested due to automatic review settings April 14, 2026 11:57

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

@dotnet-policy-service

Copy link
Copy Markdown
Contributor

Tagging subscribers to this area: @dotnet/area-extensions-filesystem
See info in area-owners.md if you want to be subscribed.

@rosebyterosebyte left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Tarek's comment looks reasonable, please consider it before merging..

@adamsitnikadamsitnik left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM, I am going to allow myself to merge it so the CI is in better shape. Thank you @svick !

@adamsitnik
adamsitnik enabled auto-merge (squash) April 15, 2026 13:49
@adamsitnik
adamsitnik merged commit 3024b5a into dotnet:mainApr 15, 2026
103 of 108 checks passed
@svick
svick deleted the tokenfireswhenfilecreated-ci-timeout branch April 15, 2026 13:52
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 17, 2026
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test timing out in CI

6 participants

@svick@adamsitnik@jkotas@tarekgh@rosebyte
, '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

Skip flaky FileConfigurationProvider test on .NET Framework - #126874

Merged
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout
Apr 15, 2026
Merged

Skip flaky FileConfigurationProvider test on .NET Framework#126874
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout

Conversation

@svick

@svicksvick commented Apr 14, 2026

Copy link
Copy Markdown
Member

Note

This PR was AI/Copilot-generated.

Fixes#126787

Problem

The ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test introduced in #126411 is flaky on the net481-windows-Release-x86 CI leg, causing it to time out and block CI.

Root cause

FileSystemWatcher on .NET Framework drops directory creation events under I/O contention. The PendingCreationWatcher in PhysicalFilesWatcher relies on FSW to detect when a missing root directory is created. When the FSW event is lost, the change token never fires and the test hangs.

This was verified by:

  1. Reproducing locally — running the test in parallel (4-8 concurrent dotnet test processes) reproduces the hang on net481 x86 (~3% failure rate).
  2. Isolating to raw FSW — a minimal test using only FileSystemWatcher (no PendingCreationWatcher) also fails under the same conditions on .NET Framework.
  3. Confirming .NET is unaffected — 504 runs on net11.0 x86 with 8 concurrent threads produced 0 failures.

All 7 CI failures in the issue report are on the same net481-windows-Release-x86-NET481_Release-Windows.10.Amd64.Client.Open configuration.

Changes

  • Skip on .NET Framework: Changed [Fact] to [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotNetFramework))] since the test depends on FSW reliability that .NET Framework cannot guarantee under load.
  • Improved timeout: Replaced CancellationTokenSource-based timeout with Task.WaitAsync(TimeSpan) (via TaskTimeoutExtensions polyfill) and added TaskCreationOptions.RunContinuationsAsynchronously — matching the pattern used by all similar tests in PhysicalFilesWatcherTests.

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

This PR addresses CI flakiness in Microsoft.Extensions.Configuration.FileExtensions tests by skipping a FileSystemWatcher-dependent integration test on .NET Framework and aligning the test’s timeout/waiting pattern with existing watcher tests.

Changes:

  • Skip ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated on .NET Framework via ConditionalFact(... IsNotNetFramework).
  • Replace CTS-based timeout logic with Task.WaitAsync(TimeSpan) and RunContinuationsAsynchronously for the TCS.
  • Add the shared TaskTimeoutExtensions polyfill to the test project to support WaitAsync on TFMs that lack it.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

FileDescription
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/Microsoft.Extensions.Configuration.FileExtensions.Tests.csprojAdds shared TaskTimeoutExtensions to enable WaitAsync in this test assembly.
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/FileConfigurationProviderTest.csSkips the flaky test on .NET Framework and updates the wait/timeout implementation for the change token.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
CopilotAI review requested due to automatic review settings April 14, 2026 11:57

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

@dotnet-policy-service

Copy link
Copy Markdown
Contributor

Tagging subscribers to this area: @dotnet/area-extensions-filesystem
See info in area-owners.md if you want to be subscribed.

@rosebyterosebyte left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Tarek's comment looks reasonable, please consider it before merging..

@adamsitnikadamsitnik left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM, I am going to allow myself to merge it so the CI is in better shape. Thank you @svick !

@adamsitnik
adamsitnik enabled auto-merge (squash) April 15, 2026 13:49
@adamsitnik
adamsitnik merged commit 3024b5a into dotnet:mainApr 15, 2026
103 of 108 checks passed
@svick
svick deleted the tokenfireswhenfilecreated-ci-timeout branch April 15, 2026 13:52
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 17, 2026
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test timing out in CI

6 participants

@svick@adamsitnik@jkotas@tarekgh@rosebyte
, '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

Skip flaky FileConfigurationProvider test on .NET Framework - #126874

Merged
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout
Apr 15, 2026
Merged

Skip flaky FileConfigurationProvider test on .NET Framework#126874
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout

Conversation

@svick

@svicksvick commented Apr 14, 2026

Copy link
Copy Markdown
Member

Note

This PR was AI/Copilot-generated.

Fixes#126787

Problem

The ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test introduced in #126411 is flaky on the net481-windows-Release-x86 CI leg, causing it to time out and block CI.

Root cause

FileSystemWatcher on .NET Framework drops directory creation events under I/O contention. The PendingCreationWatcher in PhysicalFilesWatcher relies on FSW to detect when a missing root directory is created. When the FSW event is lost, the change token never fires and the test hangs.

This was verified by:

  1. Reproducing locally — running the test in parallel (4-8 concurrent dotnet test processes) reproduces the hang on net481 x86 (~3% failure rate).
  2. Isolating to raw FSW — a minimal test using only FileSystemWatcher (no PendingCreationWatcher) also fails under the same conditions on .NET Framework.
  3. Confirming .NET is unaffected — 504 runs on net11.0 x86 with 8 concurrent threads produced 0 failures.

All 7 CI failures in the issue report are on the same net481-windows-Release-x86-NET481_Release-Windows.10.Amd64.Client.Open configuration.

Changes

  • Skip on .NET Framework: Changed [Fact] to [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotNetFramework))] since the test depends on FSW reliability that .NET Framework cannot guarantee under load.
  • Improved timeout: Replaced CancellationTokenSource-based timeout with Task.WaitAsync(TimeSpan) (via TaskTimeoutExtensions polyfill) and added TaskCreationOptions.RunContinuationsAsynchronously — matching the pattern used by all similar tests in PhysicalFilesWatcherTests.

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

This PR addresses CI flakiness in Microsoft.Extensions.Configuration.FileExtensions tests by skipping a FileSystemWatcher-dependent integration test on .NET Framework and aligning the test’s timeout/waiting pattern with existing watcher tests.

Changes:

  • Skip ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated on .NET Framework via ConditionalFact(... IsNotNetFramework).
  • Replace CTS-based timeout logic with Task.WaitAsync(TimeSpan) and RunContinuationsAsynchronously for the TCS.
  • Add the shared TaskTimeoutExtensions polyfill to the test project to support WaitAsync on TFMs that lack it.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

FileDescription
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/Microsoft.Extensions.Configuration.FileExtensions.Tests.csprojAdds shared TaskTimeoutExtensions to enable WaitAsync in this test assembly.
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/FileConfigurationProviderTest.csSkips the flaky test on .NET Framework and updates the wait/timeout implementation for the change token.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
CopilotAI review requested due to automatic review settings April 14, 2026 11:57

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

@dotnet-policy-service

Copy link
Copy Markdown
Contributor

Tagging subscribers to this area: @dotnet/area-extensions-filesystem
See info in area-owners.md if you want to be subscribed.

@rosebyterosebyte left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Tarek's comment looks reasonable, please consider it before merging..

@adamsitnikadamsitnik left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM, I am going to allow myself to merge it so the CI is in better shape. Thank you @svick !

@adamsitnik
adamsitnik enabled auto-merge (squash) April 15, 2026 13:49
@adamsitnik
adamsitnik merged commit 3024b5a into dotnet:mainApr 15, 2026
103 of 108 checks passed
@svick
svick deleted the tokenfireswhenfilecreated-ci-timeout branch April 15, 2026 13:52
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 17, 2026
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test timing out in CI

6 participants

@svick@adamsitnik@jkotas@tarekgh@rosebyte
, '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

Skip flaky FileConfigurationProvider test on .NET Framework - #126874

Merged
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout
Apr 15, 2026
Merged

Skip flaky FileConfigurationProvider test on .NET Framework#126874
adamsitnik merged 3 commits into
dotnet:mainfrom
svick:tokenfireswhenfilecreated-ci-timeout

Conversation

@svick

@svicksvick commented Apr 14, 2026

Copy link
Copy Markdown
Member

Note

This PR was AI/Copilot-generated.

Fixes#126787

Problem

The ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test introduced in #126411 is flaky on the net481-windows-Release-x86 CI leg, causing it to time out and block CI.

Root cause

FileSystemWatcher on .NET Framework drops directory creation events under I/O contention. The PendingCreationWatcher in PhysicalFilesWatcher relies on FSW to detect when a missing root directory is created. When the FSW event is lost, the change token never fires and the test hangs.

This was verified by:

  1. Reproducing locally — running the test in parallel (4-8 concurrent dotnet test processes) reproduces the hang on net481 x86 (~3% failure rate).
  2. Isolating to raw FSW — a minimal test using only FileSystemWatcher (no PendingCreationWatcher) also fails under the same conditions on .NET Framework.
  3. Confirming .NET is unaffected — 504 runs on net11.0 x86 with 8 concurrent threads produced 0 failures.

All 7 CI failures in the issue report are on the same net481-windows-Release-x86-NET481_Release-Windows.10.Amd64.Client.Open configuration.

Changes

  • Skip on .NET Framework: Changed [Fact] to [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotNetFramework))] since the test depends on FSW reliability that .NET Framework cannot guarantee under load.
  • Improved timeout: Replaced CancellationTokenSource-based timeout with Task.WaitAsync(TimeSpan) (via TaskTimeoutExtensions polyfill) and added TaskCreationOptions.RunContinuationsAsynchronously — matching the pattern used by all similar tests in PhysicalFilesWatcherTests.

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

This PR addresses CI flakiness in Microsoft.Extensions.Configuration.FileExtensions tests by skipping a FileSystemWatcher-dependent integration test on .NET Framework and aligning the test’s timeout/waiting pattern with existing watcher tests.

Changes:

  • Skip ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated on .NET Framework via ConditionalFact(... IsNotNetFramework).
  • Replace CTS-based timeout logic with Task.WaitAsync(TimeSpan) and RunContinuationsAsynchronously for the TCS.
  • Add the shared TaskTimeoutExtensions polyfill to the test project to support WaitAsync on TFMs that lack it.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

FileDescription
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/Microsoft.Extensions.Configuration.FileExtensions.Tests.csprojAdds shared TaskTimeoutExtensions to enable WaitAsync in this test assembly.
src/libraries/Microsoft.Extensions.Configuration.FileExtensions/tests/FileConfigurationProviderTest.csSkips the flaky test on .NET Framework and updates the wait/timeout implementation for the change token.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
CopilotAI review requested due to automatic review settings April 14, 2026 11:57

CopilotAI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

@dotnet-policy-service

Copy link
Copy Markdown
Contributor

Tagging subscribers to this area: @dotnet/area-extensions-filesystem
See info in area-owners.md if you want to be subscribed.

@rosebyterosebyte left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Tarek's comment looks reasonable, please consider it before merging..

@adamsitnikadamsitnik left a comment

Copy link
Copy Markdown
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM, I am going to allow myself to merge it so the CI is in better shape. Thank you @svick !

@adamsitnik
adamsitnik enabled auto-merge (squash) April 15, 2026 13:49
@adamsitnik
adamsitnik merged commit 3024b5a into dotnet:mainApr 15, 2026
103 of 108 checks passed
@svick
svick deleted the tokenfireswhenfilecreated-ci-timeout branch April 15, 2026 13:52
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 17, 2026
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

ResolveFileProvider_WithMissingParentDirectory_WatchTokenFiresWhenFileCreated test timing out in CI

6 participants

@svick@adamsitnik@jkotas@tarekgh@rosebyte