Here are some other details of the error that may help. There seem to be two errors happening at once, they have the same timestamp in logs. They are probably related/the same.
Category: WEB
Message: An error occurred processing a GET request to http://subdomain.tld/nuget/approved-nuget/v3/registrations-gz/system.security.cryptography.algorithms/index.json: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 40 - Could not open a connection to SQL Server: Could not open a connection to SQL Server)
Details: Microsoft.Data.SqlClient.SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 40 - Could not open a connection to SQL Server: Could not open a connection to SQL Server)
at
Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at
Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at
Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
at
Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at Microsoft.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry, SqlConnectionOverrides overrides)
at
Microsoft.Data.SqlClient.SqlConnection.InternalOpenAsync(CancellationToken cancellationToken)
--- End of stack trace from previous location ---
at
Inedo.Data.SqlServerDatabaseContext.CreateConnectionAsync()
at
Inedo.Data.DatabaseContext.ExecuteInternalAsync(String storedProcName, GenericDbParameter[] parameters)
at
Inedo.Data.SqlServerDatabaseContext.ExecuteInternalAsync(String storedProcName, GenericDbParameter[] parameters)
at
Inedo.Data.DatabaseContext.ExecuteTableAsync[TRow](String storedProcName, GenericDbParameter[] parameters)
at
Inedo.ProGet.Feeds.NuGet.NuGetFeed.GetPackageV3Async(String packageId) in C:\Users\builds\AppData\Local\Temp\InedoAgent\BuildMaster\192.168.44.60\Temp\_E340542\Src\ProGetCoreEx\Feeds\NuGet\NuGetFeed.cs:line 230
at
Inedo.ProGet.WebApplication.FeedEndpoints.NuGet.V3.PackageMetadataHandler.ProcessRequestAsync(NuGetFeed feed, AhHttpContext context, WebApiContext apiContext, String relativeUrl) in C:\Users\builds\AppData\Local\Temp\InedoAgent\BuildMaster\192.168.44.60\Temp\_E340542\Src\ProGet.WebApplication\FeedEndpoints\NuGet\V3\PackageMetadataHandler.cs:line 35
at
Inedo.ProGet.WebApplication.FeedEndpoints.NuGet.NuGetFeedHandler.ProcessRequestAsync(AhHttpContext context, WebApiContext apiContext, NuGetFeed feed, String relativeUrl) in C:\Users\builds\AppData\Local\Temp\InedoAgent\BuildMaster\192.168.44.60\Temp\_E340542\Src\ProGet.WebApplication\FeedEndpoints\NuGet\NuGetFeedHandler.cs:line 30
at
Inedo.ProGet.WebApplication.FeedEndpoints.FeedEndpointHandler.FeedRequestHandler.ProcessRequestAsync(AhHttpContext context) in C:\Users\builds\AppData\Local\Temp\InedoAgent\BuildMaster\192.168.44.60\Temp\_E340542\Src\ProGet.WebApplication\FeedEndpoints\FeedEndpointHandler.cs:line 188
ClientConnectionId:00000000-0000-0000-0000-000000000000
Category: Web
Message: An error occurred in the web application: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 40 - Could not open a connection to SQL Server: Could not open a connection to SQL Server)
Details:
URL: http://subdomain.tld/nuget/approved-nuget/v3/registrations-gz/microsoft.identitymodel.logging/index.json
Referrer: (not set)
User: (unknown)
User Agent: NuGet VS VSIX/6.7.0 (Microsoft Windows NT 10.0.19045.0, Professional/17.0)
Stack trace: at
Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at
Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at
Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
at
Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at
Microsoft.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry, SqlConnectionOverrides overrides)
at
Microsoft.Data.SqlClient.SqlConnection.Open(SqlConnectionOverrides overrides)
at
Inedo.Data.SqlServerDatabaseContext.CreateConnection()
at
Inedo.Data.DatabaseContext.ExecuteInternal(String storedProcName, GenericDbParameter[] parameters)
at
Inedo.Data.SqlServerDatabaseContext.ExecuteInternal(String storedProcName, GenericDbParameter[] parameters)
at
Inedo.Data.StrongDataReader.Read[TRow](Func`1 getReader, Boolean disposeReader)+MoveNext()
at
System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Boolean& found)
at
Inedo.ProGet.Data.DB.Context.Feeds_GetFeed(Nullable`1 Feed_Id, String Feed_Name) in C:\Users\builds\AppData\Local\Temp\InedoAgent\BuildMaster\192.168.44.60\Temp\_E340542\Src\ProGetCoreEx\InedoLib.Analyzers\InedoLib.Analyzers.DatabaseContextGenerator\DB.g.cs:line 5726
at
Inedo.ProGet.WebApplication.FeedEndpoints.FeedEndpointHandler.GetHttpHandler(GetHandlerParams args) in C:\Users\builds\AppData\Local\Temp\InedoAgent\BuildMaster\192.168.44.60\Temp\_E340542\Src\ProGet.WebApplication\FeedEndpoints\FeedEndpointHandler.cs:line 43
at
Inedo.Web.Handlers.DynamicHttpHandling.GetHandler(AhHttpContext context, String requestType, String url, String pathTranslated)
at Inedo.Web.AhWebMiddleware.InvokeAsync(HttpContext context)