I can't build main branch because of ssl issue with the restore

[robertpi]

Description

I can't build main branch from this repo, as the restore stage fails with various SSL errors:

C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error : Unable to load the service index for source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   The SSL connection could not be established, see inner exception. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   An existing connection was forcibly closed by the remote host. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]

I the error messages is not always the sames, so it does look like a network issue, but could conceivably be something I'm doing wrong too.

Configuration

• Which version of .NET is the code running on?

>dotnet --list-sdks
C:\code\runtime\.dotnet
6.0.100-preview.2.21155.3 [C:\code\runtime\.dotnet\sdk]

c:\code
>dotnet --list-sdks
2.1.815 [C:\Program Files\dotnet\sdk]
2.2.207 [C:\Program Files\dotnet\sdk]
3.0.103 [C:\Program Files\dotnet\sdk]
3.1.114 [C:\Program Files\dotnet\sdk]
5.0.101 [C:\Program Files\dotnet\sdk]

• What OS and version, and what distro if applicable?

Windows 10 -10.0.19042 Build 19042

• What is the architecture (x64, x86, ARM, ARM64)?

x64

Regression?

This is the first time I've attempted to build on this laptop<

Other information

I noticed it looks similar to this issue: #52053 , but I don't think it's the same issue as the download of the initial sdk seems to work okay.

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

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

Issue Details

---

Description

I can't build main branch from this repo, as the restore stage fails with various SSL errors:

C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error : Unable to load the service index for source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   The SSL connection could not be established, see inner exception. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   An existing connection was forcibly closed by the remote host. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]

I the error messages is not always the sames, so it does look like a network issue, but could conceivably be something I'm doing wrong too.

Configuration

• Which version of .NET is the code running on?

>dotnet --list-sdks
C:\code\runtime\.dotnet
6.0.100-preview.2.21155.3 [C:\code\runtime\.dotnet\sdk]

c:\code
>dotnet --list-sdks
2.1.815 [C:\Program Files\dotnet\sdk]
2.2.207 [C:\Program Files\dotnet\sdk]
3.0.103 [C:\Program Files\dotnet\sdk]
3.1.114 [C:\Program Files\dotnet\sdk]
5.0.101 [C:\Program Files\dotnet\sdk]

• What OS and version, and what distro if applicable?

Windows 10 -10.0.19042 Build 19042

• What is the architecture (x64, x86, ARM, ARM64)?

x64

Regression?

This is the first time I've attempted to build on this laptop<

Other information

I noticed it looks similar to this issue: #52053 , but I don't think it's the same issue as the download of the initial sdk seems to work okay.

Author:	robertpi
Assignees:	-
Labels:	area-Infrastructure, untriaged
Milestone:	-

[hoyosjs]

Dupe of #51640. When you update to preview 3 like in #52196, the issue should go away. Feel free to comment if this doesn't work and I'll reopen.

[danmoseley]

Wasn't that linux only @hoyosjs ?

[ericstj]

#51640 was with package signing, this appears to be happen earlier than that, when Nuget is connecting to AzDo feed.

I noticed it looks similar to this issue: #52053 , but I don't think it's the same issue as the download of the initial sdk seems to work okay.

Download of the initial SDK doesn't happen through latest .NET runtime, it uses PowerShell which will use .NETFramework in OS. It could be the same issue. cc @dotnet/ncl

[hoyosjs]

Indeed. My bad, I somehow read the message and missed the path completely. This seems like a rude closed connection. The only thing that I could find around this is https://developercommunity.visualstudio.com/t/deployment-failing-in-release-pipeline-1/932190 and microsoft/azure-pipelines-tasks#12444 (comment). Not sure if it applies as I don't see a TLS version warning on yours, but this is easy to check.

[robertpi]

I checked that I'm using a recent version of powershell, it seems it meets the minimum specified:

PS C:\Users\rober> $PSVersionTable.PSVersion

Major  Minor  Build  Revision
-----  -----  -----  --------
5      1      19041  906

I also entered the following values into my registry:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\v2.0.50727]
"SystemDefaultTlsVersions"=dword:00000001
"SchUseStrongCrypto"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\v4.0.30319]
"SystemDefaultTlsVersions"=dword:00000001
"SchUseStrongCrypto"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v2.0.50727]
"SystemDefaultTlsVersions"=dword:00000001
"SchUseStrongCrypto"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319]
"SystemDefaultTlsVersions"=dword:00000001
"SchUseStrongCrypto"=dword:00000001

This didn't seem to make any difference.

If I try to manually download the url causing an issue, it seems to work fine:

PS C:\Users\rober> (New-Object System.Net.WebClient).DownloadString("https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json")
{"@context":{"@vocab":"http://schema.nuget.org/services#","comment":"http://www.w3.org/2000/01/rdf-schema#comment","label":"http://www.w3.org/2000/01/rdf-schema#label"},"resources":[{"@id":"https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/45bacae2-5efb-47c ...

[robertpi]

I decided to check with fiddle which URLs were failing, but this seemed to cause the error message to change, to variations of the following:

c:\code\runtime
>build.cmd -Restore
  Determining projects to restore...
  Tool 'coverlet.console' (version '1.7.2') was restored. Available commands: coverlet
  Tool 'dotnet-reportgenerator-globaltool' (version '4.5.8') was restored. Available commands: reportgenerator
  Tool 'microsoft.dotnet.xharness.cli' (version '1.0.0-prerelease.21227.1') was restored. Available commands: xharness
  Tool 'microsoft.visualstudio.slngen.tool' (version '5.0.5') was restored. Available commands: slngen

  Restore was successful.
  Failed to download package 'Microsoft.DotNet.SignTool.6.0.0-beta.21222.1' from 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/1a5f89f6-d8da-4080-b15f-242650c914a8/nuget/v3/flat2/microsoft.dotnet.signtool/6.0.0-beta.21222.1/microsoft.dotnet.signtool.6.0.0-beta.21222.1.nupkg'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Failed to download package 'Microsoft.DotNet.SignTool.6.0.0-beta.21222.1' from 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/1a5f89f6-d8da-4080-b15f-242650c914a8/nuget/v3/flat2/microsoft.dotnet.signtool/6.0.0-beta.21222.1/microsoft.dotnet.signtool.6.0.0-beta.21222.1.nupkg'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/azure-public/3ccf6661-f8ce-4e8a-bb2e-eff943ddd3c7/_packaging/58ca65bb-e6c1-4210-88ac-fa55c1cd7877/nuget/v3/flat2/microsoft.dotnet.build.tasks.packaging/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/45bacae2-5efb-47c8-91e5-8ec20c22b4f8/nuget/v3/flat2/microsoft.dotnet.build.tasks.feed/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/1a5f89f6-d8da-4080-b15f-242650c914a8/nuget/v3/flat2/microsoft.dotnet.packagevalidation/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/d1622942-d16f-48e5-bc83-96f4539e7601/nuget/v3/flat2/microsoft.dotnet.packagevalidation/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/c9f8ac11-6bd8-4926-8306-f075241547f7/nuget/v3/flat2/microsoft.dotnet.packagevalidation/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/d1622942-d16f-48e5-bc83-96f4539e7601/nuget/v3/flat2/microsoft.dotnet.build.tasks.feed/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/d1622942-d16f-48e5-bc83-96f4539e7601/nuget/v3/flat2/microsoft.dotnet.versiontools.tasks/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/azure-public/3ccf6661-f8ce-4e8a-bb2e-eff943ddd3c7/_packaging/58ca65bb-e6c1-4210-88ac-fa55c1cd7877/nuget/v3/flat2/microsoft.dotnet.build.tasks.feed/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/45bacae2-5efb-47c8-91e5-8ec20c22b4f8/nuget/v3/flat2/microsoft.dotnet.versiontools.tasks/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/1a5f89f6-d8da-4080-b15f-242650c914a8/nuget/v3/flat2/microsoft.dotnet.packagevalidation/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/c9f8ac11-6bd8-4926-8306-f075241547f7/nuget/v3/flat2/microsoft.dotnet.packagevalidation/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/azure-public/3ccf6661-f8ce-4e8a-bb2e-eff943ddd3c7/_packaging/58ca65bb-e6c1-4210-88ac-fa55c1cd7877/nuget/v3/flat2/microsoft.dotnet.build.tasks.feed/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
  Retrying 'FindPackagesByIdAsync' for source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/d1622942-d16f-48e5-bc83-96f4539e7601/nuget/v3/flat2/microsoft.dotnet.versiontools.tasks/index.json'.
  The SSL connection could not be established, see inner exception.
    Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
    An existing connection was forcibly closed by the remote host.
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error : Failed to retrieve information about 'Microsoft.DotNet.PackageValidation' from remote source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/1a5f89f6-d8da-4080-b15f-242650c914a8/nuget/v3/flat2/microsoft.dotnet.packagevalidation/index.json'. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   The SSL connection could not be established, see inner exception. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   An existing connection was forcibly closed by the remote host. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]

Build FAILED.

C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error : Failed to retrieve information about 'Microsoft.DotNet.PackageValidation' from remote source 'https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/1a5f89f6-d8da-4080-b15f-242650c914a8/nuget/v3/flat2/microsoft.dotnet.packagevalidation/index.json'. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   The SSL connection could not be established, see inner exception. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.targets(131,5): error :   An existing connection was forcibly closed by the remote host. [C:\Users\rober\.nuget\packages\microsoft.dotnet.arcade.sdk\6.0.0-beta.21222.1\tools\Tools.proj]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:04.98
Build failed with exit code 1. Check errors above.
Some builds failed:
        Configuration: Debug, Architecture: x64

I noticed that while some failures were for .json index files, others where for actual nuget packages, for example: https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/1a5f89f6-d8da-4080-b15f-242650c914a8/nuget/v3/flat2/microsoft.dotnet.signtool/6.0.0-beta.21222.1/microsoft.dotnet.signtool.6.0.0-beta.21222.1.nupkg. I found I could download these packages manually via Chrome, which seems to have some retry mechanism build in.

I installed this packages locally via:

dotnet nuget add source C:\Users\rober\AppData\Local\PackageManagement\NuGet\Packages

Install-Package microsoft.dotnet.build.tasks.feed -Scope CurrentUser -Source C:\Users\rober\Downloads\

Once the following packages were installed locally, the build seems to get a little further:

Microsoft.DotNet.Build.Tasks.Feed.6.0.0-beta.21222.1
Microsoft.DotNet.Build.Tasks.Packaging.6.0.0-beta.21222.1
Microsoft.DotNet.PackageValidation.6.0.0-beta.21222.1
Microsoft.DotNet.SignTool.6.0.0-beta.21222.1
Microsoft.DotNet.VersionTools.Tasks.6.0.0-beta.21222.1

However the build still fails with this error:

c:\code\runtime
>build.cmd -Restore
  Determining projects to restore...
  Tool 'coverlet.console' (version '1.7.2') was restored. Available commands: coverlet
  Tool 'dotnet-reportgenerator-globaltool' (version '4.5.8') was restored. Available commands: reportgenerator
  Tool 'microsoft.dotnet.xharness.cli' (version '1.0.0-prerelease.21227.1') was restored. Available commands: xharness
  Tool 'microsoft.visualstudio.slngen.tool' (version '5.0.5') was restored. Available commands: slngen

  Restore was successful.
  All projects are up-to-date for restore.
  Determining projects to restore...
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error : The result "" of evaluating the value "$(DotNetSharedFrameworkTaskFile)" of the "AssemblyFile" attribute in element <UsingTask> is not valid.  C:\code\runtime\src\libraries\ref.proj [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject(String errorSubCategoryResourceName, IElementLocation elementLocation, String resourceName, Object[] args) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Shared.ProjectErrorUtilities.VerifyThrowInvalidProject[T1,T2,T3,T4](Boolean condition, String errorSubCategoryResourceName, IElementLocation elementLocation, String resourceName, T1 arg0, T2 arg1, T3 arg2, T4 arg3) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Execution.TaskRegistry.RegisterTasksFromUsingTaskElement[P,I](ILoggingService loggingService, BuildEventContext buildEventContext, String directoryOfImportingFile, ProjectUsingTaskElement projectUsingTaskXml, TaskRegistry taskRegistry, Expander`2 expander, ExpanderOptions expanderOptions, IFileSystem fileSystem) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Evaluator`4.EvaluateUsingTaskElement(String directoryOfImportingFile, ProjectUsingTaskElement projectUsingTaskElement) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate(IEvaluatorData`4 data, ProjectRootElement root, ProjectLoadSettings loadSettings, Int32 maxNodeCount, PropertyDictionary`1 environmentProperties, ILoggingService loggingService, IItemFactory`2 itemFactory, IToolsetProvider toolsetProvider, ProjectRootElementCacheBase projectRootElementCache, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, EvaluationContext evaluationContext, Boolean interactive) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.ProjectImpl.Reevaluate(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.ProjectImpl.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.ProjectImpl.ReevaluateIfNecessary(EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.ProjectImpl.Initialize(IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.FromFile(String file, ProjectOptions options) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at NuGet.Build.Tasks.Console.MSBuildStaticGraphRestore.<>c__DisplayClass38_1.<LoadProjects>b__0(String path, Dictionary`2 properties, ProjectCollection collection) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.GraphBuilder.ParseProject(ConfigurationMetadata configurationMetadata) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.GraphBuilder.<>c__DisplayClass35_0.<SubmitProjectForParsing>b__0() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at System.Lazy`1.CreateValue() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at System.Lazy`1.get_Value() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ParallelWorkSet`2.ExecuteWorkItem() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ParallelWorkSet`2.<CreateProcessorItemTask>b__16_0() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ParallelWorkSet`2.WaitForAllWorkAndComplete() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.GraphBuilder.FindGraphNodes() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.GraphBuilder.BuildGraph() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ProjectGraph..ctor(IEnumerable`1 entryPoints, ProjectCollection projectCollection, ProjectInstanceFactoryFunc projectInstanceFactory, Int32 degreeOfParallelism, CancellationToken cancellationToken) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ProjectGraph..ctor(IEnumerable`1 entryPoints, ProjectCollection projectCollection, ProjectInstanceFactoryFunc projectInstanceFactory) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at NuGet.Build.Tasks.Console.MSBuildStaticGraphRestore.LoadProjects(IEnumerable`1 entryProjects) [C:\code\runtime\Build.proj]

Build FAILED.

C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error : The result "" of evaluating the value "$(DotNetSharedFrameworkTaskFile)" of the "AssemblyFile" attribute in element <UsingTask> is not valid.  C:\code\runtime\src\libraries\ref.proj [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject(String errorSubCategoryResourceName, IElementLocation elementLocation, String resourceName, Object[] args) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Shared.ProjectErrorUtilities.VerifyThrowInvalidProject[T1,T2,T3,T4](Boolean condition, String errorSubCategoryResourceName, IElementLocation elementLocation, String resourceName, T1 arg0, T2 arg1, T3 arg2, T4 arg3) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Execution.TaskRegistry.RegisterTasksFromUsingTaskElement[P,I](ILoggingService loggingService, BuildEventContext buildEventContext, String directoryOfImportingFile, ProjectUsingTaskElement projectUsingTaskXml, TaskRegistry taskRegistry, Expander`2 expander, ExpanderOptions expanderOptions, IFileSystem fileSystem) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Evaluator`4.EvaluateUsingTaskElement(String directoryOfImportingFile, ProjectUsingTaskElement projectUsingTaskElement) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate(IEvaluatorData`4 data, ProjectRootElement root, ProjectLoadSettings loadSettings, Int32 maxNodeCount, PropertyDictionary`1 environmentProperties, ILoggingService loggingService, IItemFactory`2 itemFactory, IToolsetProvider toolsetProvider, ProjectRootElementCacheBase projectRootElementCache, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, EvaluationContext evaluationContext, Boolean interactive) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.ProjectImpl.Reevaluate(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.ProjectImpl.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.ProjectImpl.ReevaluateIfNecessary(EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.ProjectImpl.Initialize(IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Evaluation.Project.FromFile(String file, ProjectOptions options) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at NuGet.Build.Tasks.Console.MSBuildStaticGraphRestore.<>c__DisplayClass38_1.<LoadProjects>b__0(String path, Dictionary`2 properties, ProjectCollection collection) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.GraphBuilder.ParseProject(ConfigurationMetadata configurationMetadata) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.GraphBuilder.<>c__DisplayClass35_0.<SubmitProjectForParsing>b__0() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at System.Lazy`1.CreateValue() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at System.Lazy`1.get_Value() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ParallelWorkSet`2.ExecuteWorkItem() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ParallelWorkSet`2.<CreateProcessorItemTask>b__16_0() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ParallelWorkSet`2.WaitForAllWorkAndComplete() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.GraphBuilder.FindGraphNodes() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.GraphBuilder.BuildGraph() [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ProjectGraph..ctor(IEnumerable`1 entryPoints, ProjectCollection projectCollection, ProjectInstanceFactoryFunc projectInstanceFactory, Int32 degreeOfParallelism, CancellationToken cancellationToken) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at Microsoft.Build.Graph.ProjectGraph..ctor(IEnumerable`1 entryPoints, ProjectCollection projectCollection, ProjectInstanceFactoryFunc projectInstanceFactory) [C:\code\runtime\Build.proj]
C:\code\runtime\.dotnet\sdk\6.0.100-preview.2.21155.3\NuGet.RestoreEx.targets(19,5): error :    at NuGet.Build.Tasks.Console.MSBuildStaticGraphRestore.LoadProjects(IEnumerable`1 entryProjects) [C:\code\runtime\Build.proj]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:11.19
Build failed with exit code 1. Check errors above.
Some builds failed:
        Configuration: Debug, Architecture: x64

Examining the http requests with fiddler, I see the download of this package fails repeatedly:

GET https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/825db618-e3eb-4426-ba54-b1d6e6c944d8/nuget/v3/flat2/microsoft.dotnet.sharedframework.sdk/index.json HTTP/1.1
Host: pkgs.dev.azure.com
X-NuGet-Session-Id: a18c7270-e1aa-4aeb-bf5a-400b35a64a36
User-Agent: NuGet Client V3/5.10.0
X-NuGet-Client-Version: 5.10.0
Accept-Language: en-GB
Accept-Encoding: gzip, deflate

{"$id":"1","innerException":null,"message":"Can't find the package 'microsoft.dotnet.sharedframework.sdk' in feed 'dotnet6'.","typeName":"Microsoft.VisualStudio.Services.NuGet.WebApi.Exceptions.PackageNotFoundException, Microsoft.VisualStudio.Services.NuGet.WebApi","typeKey":"PackageNotFoundException","errorCode":0,"eventId":3000}

Since I have no way to install microsoft.dotnet.sharedframework.sdk, I'm not sure how to get any further with this.

[ViktorHofer]

How many SDKs do you currently have installed? In case you have old 2.x or 3.x ones installed, you could try deleting those. Also we are updating the SDK to Preview 3 later today, that might also help you to get further.

[robertpi]

I have quite a few old sdks installed:

>dotnet --list-sdks
2.1.815 [C:\Program Files\dotnet\sdk]
2.2.207 [C:\Program Files\dotnet\sdk]
3.0.103 [C:\Program Files\dotnet\sdk]
3.1.114 [C:\Program Files\dotnet\sdk]
5.0.101 [C:\Program Files\dotnet\sdk]

But I'd be reluctant to remove them, since I need to be able to test with a wide range of frameworks. I don't really see how it would help, since fiddle seems to show it's very recent version of nuget that are making the failing requests.

I just tried building the v5.0.5 tag and that fails with similar issues, which makes me think the problem related to nuget servers supporting this build, although if that's the case, I don't really understand why other people aren't complaining about it.

[ViktorHofer]

I recommended to delete these old SDKs as IIRC @tmds it a similar issues and deleting old SDKs helped him. Maybe you could give it a try and afterwards reinstall the old ones?