[Flaky Test] Quarantine 2 flaky tests

[github-actions]

Summary

Quarantines 2 tests that have been repeatedly observed failing in CI across independent rolling main builds.

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1. GetEnvVars — Quarantine (6a)

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

flaky-test-id: Microsoft.Build.UnitTests.CommunicationUtilitiesTests.GetEnvVars

• Assembly: Microsoft.Build.Framework.UnitTests
• Distinct sources: 3 rolling builds
• Rolling build IDs: 1514373, 1517682, 1527742
• Legs: CoreOnLinux
• First seen: 2026-07-17 / Last seen: 2026-07-27

Tracked by #14541

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2. ServerSpawnAndReuseAreLoggedToBuildLog — Quarantine (6a)

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

flaky-test-id: Microsoft.Build.Engine.UnitTests.MSBuildServer_Tests.ServerSpawnAndReuseAreLoggedToBuildLog

• Assembly: Microsoft.Build.CommandLine.UnitTests
• Distinct sources: 3 rolling builds
• Rolling build IDs: 1514373, 1517682, 1527742
• Legs: FullOnWindows Release
• Error hashes: f2f3ee09, 4af42ebc, 347b6841 (3 distinct failure signatures)
• First seen: 2026-07-17 / Last seen: 2026-07-27

Tracked by #14540

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 · 119.8 AIC · ⌖ 6.34 AIC · ⊞ 14.7K · ◷