仅当我在共享主机上部署ASP .NET Core 2.1 Web App时，才会出现此问题。我正在将Azure Key保险库与PersistKeysToFileSystem一起使用。
在使用PersistKeysToFileSystem的情况下，无论有无Azure Key Vault，Web App都可以在我的开发计算机和Azure App上正常运行。
fail: Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider[48]
An error occurred while reading the key ring.
System.Net.Http.HttpRequestException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken)
at System.Threading.Tasks.ValueTask``1.get_Result()
at System.Net.Http.HttpConnectionPool.CreateConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
at System.Threading.Tasks.ValueTask``1.get_Result()
at System.Net.Http.HttpConnectionPool.WaitForCreatedConnectionAsync(ValueTask``1 creationTask)
at System.Threading.Tasks.ValueTask``1.get_Result()
at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)
at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task``1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)
at Microsoft.Azure.KeyVault.KeyVaultCredential.ProcessHttpRequestAsync(HttpRequestMessage request, CancellationToken cancellationToken)
at Microsoft.Azure.KeyVault.KeyVaultClient.WrapKeyWithHttpMessagesAsync(String vaultBaseUrl, String keyName, String keyVersion, String algorithm, Byte[] value, Dictionary``2 customHeaders, CancellationToken cancellationToken)
at Microsoft.Azure.KeyVault.KeyVaultClientExtensions.WrapKeyAsync(IKeyVaultClient operations, String keyIdentifier, String algorithm, Byte[] key, CancellationToken cancellationToken)
at Microsoft.AspNetCore.DataProtection.AzureKeyVault.AzureKeyVaultXmlEncryptor.EncryptAsync(XElement plaintextElement)
at Microsoft.AspNetCore.DataProtection.AzureKeyVault.AzureKeyVaultXmlEncryptor.Encrypt(XElement plaintextElement)
at Microsoft.AspNetCore.DataProtection.XmlEncryption.XmlEncryptionExtensions.EncryptIfNecessary(IXmlEncryptor encryptor, XElement element)
at Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager.Microsoft.AspNetCore.DataProtection.KeyManagement.Internal.IInternalXmlKeyManager.CreateNewKey(Guid keyId, DateTimeOffset creationDate, DateTimeOffset activationDate, DateTimeOffset expirationDate)
at Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager.CreateNewKey(DateTimeOffset activationDate, DateTimeOffset expirationDate)
at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider.CreateCacheableKeyRingCore(DateTimeOffset now, IKey keyJustAdded)
at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider.Microsoft.AspNetCore.DataProtection.KeyManagement.Internal.ICacheableKeyRingProvider.GetCacheableKeyRing(DateTimeOffset now)
at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider.GetCurrentKeyRingCore(DateTime utcNow)
Hosting environment: Production
答案 0 :(得分：0)
在安装Active Directory之后遇到了此问题，并且我的解决方案将IIS应用程序池的“加载用户配置文件”设置为“真”。