System.Net.NameResolution.Tests DNS failures: Name or service not known #126641
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Use this to report build issues in the .NET Helix tabUse this to report build issues in the .NET Helix tabBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'Blocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'The issue is caused by external problem (e.g. OS) - nothing we can do to fix it directlyThe issue is caused by external problem (e.g. OS) - nothing we can do to fix it directly
Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1368622
Build error leg or test failing: System.Net.NameResolution.Tests.GetHostByNameTest.DnsObsoleteBeginEndGetHostByName_EmptyString_ReturnsHostName
Pull request: #125647
Error Message
Fill the error message using step by step known issues guidance.
{ "ErrorMessage": "", "ErrorPattern": "System\\.Net\\.Sockets\\.SocketException : Name or service not known|System\\.Exception : Failed for empty hostname", "BuildRetry": false, "ExcludeConsoleLog": false }Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1368622
Error message validated:
[System\.Net\.Sockets\.SocketException : Name or service not known|System\.Exception : Failed for empty hostname]Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/8/2026 12:37:43 PM UTC
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