[Flaky Test] Quarantine 1 flaky test

[github-actions]

Automated flaky-test quarantine (2026-07-27).

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Quarantine: SingleBuild_CoordinatorCapsMaxNodeCount

Flaky-test key (automated de-duplication — do not edit):

flaky-test-id: Microsoft.Build.Coordinator.UnitTests.CoordinatorIntegration_Tests.SingleBuild_CoordinatorCapsMaxNodeCount

Tracked by #14516

• Action: quarantine (6a) — added [ActiveIssue("https://github.com/dotnet/msbuild/issues/14516")]
• File: src/MSBuild.Coordinator.UnitTests/CoordinatorIntegration_Tests.cs
• Distinct sources: 3 (3 PRs: Add event-level task telemetry (build/tasks/details) #13609, Harden coordinator client lifecycle races #14240, Rewrite branch freeze automation in PowerShell #14470; 0 rolling builds)
• Legs: CoreOnLinux, CoreOnWindows, FullOnWindows Release
• TFMs: net10.0, net11.0, net472
• Error hashes: 3 distinct (4039adb7, 55b6331b, ba217936)
• First seen: 2026-07-17 | Last seen: 2026-07-23
• Sample build

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Also tracked this run (new issues filed; quarantine eligible next run)

• Microsoft.Build.BuildCheck.UnitTests.EndToEndTests.TFMinNonSdkCheckTest (3 rolling builds, 4 error hashes)
• Microsoft.Build.Engine.UnitTests.MSBuildServer_Tests.ServerSpawnAndReuseAreLoggedToBuildLog (3 rolling builds, 3 error hashes)
• Microsoft.Build.UnitTests.CommunicationUtilitiesTests.GetEnvVars (3 rolling builds, 2 error hashes)

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Skipped (possible regression — human triage needed)

The following tests showed a single stable error hash failing across the same set of 4 rolling builds with no PR sources, which may indicate a regression rather than a flake:

• Microsoft.Build.UnitTests.CodeTaskFactoryTests.* (7 tests, hash 2f59b830, builds 1506834/1514373/1517682/1527742)
• Microsoft.Build.UnitTests.CodeTaskFactoryTests.EmbedsGenerated* (2 tests, hash d888cdeb, same builds)

These were not quarantined to avoid masking a real bug. Human investigation recommended.

Warning

Firewall blocked 2 domains

The following domains were blocked by the firewall during workflow execution:

• awmgmcpg
• southcentralus0.in.applicationinsights.azure.com

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "awmgmcpg"
    - "southcentralus0.in.applicationinsights.azure.com"

See Network Configuration for more information.

Generated by Flaky Test Triage · sonnet46 · 153.8 AIC · ⌖ 6.72 AIC · ⊞ 14.7K · ◷