`dotnetup` should handle transient network issue ` Error: nodename nor servname provided, or not known (builds.dotnet.microsoft.com:443)`

[nagilson]

Prerequisites

• I have read the dotnetup documentation.
• I have searched for existing dotnetup issues.
• I have searched for existing dotnetup discussions.

Issue type

Bug report

Description

Several tests all at once in a single CI run failed. https://dev.azure.com/dnceng-public/public/_build/results?buildId=1496107&view=logs&jobId=68f2ee65-ec18-580c-7ed2-d0a4cae11481&j=68f2ee65-ec18-580c-7ed2-d0a4cae11481&t=89557a5d-cf8b-5204-5db5-1c689223a1e8 This only occurred so far on the amd64 mac. It seems likely transient as the change for get-dotnetup scripts seems unrelated to this problem.

Many tests passed, so it also seems like a transient network problem that we should probably handle better.

  total: 1094
  failed: 7
  succeeded: 1059
  skipped: 28
  duration: 5m 36s 735ms

failed RuntimeInstall ("9.0",Runtime) (134ms)
  Test method Microsoft.DotNet.Tools.Dotnetup.Tests.InstallEndToEndTests.RuntimeInstall threw exception:
  FluentAssertions.Execution.AssertionFailedException: Expected exitCode to be 0 because dotnetup exited with code 1. Output:
  Error: nodename nor servname provided, or not known (builds.dotnet.microsoft.com:443)
  , but found 1 (difference of 1).
    at FluentAssertions.Execution.FallbackTestFramework.Throw(String message)
    at FluentAssertions.Execution.DefaultAssertionStrategy.HandleFailure(String message)
    at FluentAssertions.Execution.AssertionChain.FailWith(Func`1 getFailureReason)
    at FluentAssertions.Numeric.NumericAssertionsBase`3.Be(T expected, String because, Object[] becauseArgs)
    at Microsoft.DotNet.Tools.Dotnetup.Tests.InstallEndToEndTests.RuntimeInstall(String componentSpec, InstallComponent expectedComponent) in /Users/runner/work/1/s/test/dotnetup.Tests/DnupE2Etest.cs:123
    at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
    at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
    at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
    at System.Reflection.MethodBaseInvoker.InvokeDirectByRefWithFewArgs(Object obj, Span`1 copyOfArgs, BindingFlags invokeAttr)

failed EnvScript_WorksWithSpecialCharactersInPath (133ms)
  Test method Microsoft.DotNet.Tools.Dotnetup.Tests.InstallEndToEndTests.EnvScript_WorksWithSpecialCharactersInPath threw exception:
  FluentAssertions.Execution.AssertionFailedException: Expected exitCode to be 0 because SDK installation failed with special characters in path. Output:
  Error: nodename nor servname provided, or not known (builds.dotnet.microsoft.com:443)
  , but found 1 (difference of 1).
    at FluentAssertions.Execution.FallbackTestFramework.Throw(String message)
    at FluentAssertions.Execution.DefaultAssertionStrategy.HandleFailure(String message)
    at FluentAssertions.Execution.AssertionChain.FailWith(Func`1 getFailureReason)
    at FluentAssertions.Numeric.NumericAssertionsBase`3.Be(T expected, String because, Object[] becauseArgs)
    at Microsoft.DotNet.Tools.Dotnetup.Tests.InstallEndToEndTests.EnvScript_WorksWithSpecialCharactersInPath() in /Users/runner/work/1/s/test/dotnetup.Tests/DnupE2Etest.cs:144
    at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
    at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

dotnetup version

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