訪問從webAPI調用GetSecretAsync時發生零星500錯誤

我們有一個webapi，Azure SQL DB和keyvault託管在azure上。一切都很好，直到大約一週後。我們必須刪除並重新創建資源組。此之後，我們開始越來越零星500 「內部服務器錯誤」在進一步的調試，我們發現，KeyVaultClient GetSecretAsync拋出下面的錯誤：訪問從webAPI調用GetSecretAsync時發生零星500錯誤

2017年10月4日15：08：06：265 - [7664：40] - 錯誤 - MyService.Helper.ConnectionFactory -

發生一個或多個錯誤。在System.Threading.Tasks.Task`1.GetResultCore（布爾waitCompletionNotification）在Common.KeyVaultReader.KeyVaultHelper.GetSecret（字符串secretName）在syngo.DataCloud.CD.Service.Helper.ConnectionFactory..ctor（IKeyVaultHelper keyVaultHelper）

但最令人困惑的是，如果我們部署到另一個端點，相同的代碼工作。即使在相同的部署中，它也可以用於一組GET/POST調用，但對另一組不起作用。

我對如何去修復它感到茫然。下面

KeyvaultHelper GetSecret代碼：

using (var kvClient = new KeyVaultClient(GetToken)) 
{ 
    var secret = Task.Run(async() => 
    { 
    return await kvClient.GetSecretAsync(secretURI, secretName).ConfigureAwait(false); 
    }); 
    return secret.Result.Value; 
}

更新：

Aggregate exception as below: 

2017-10-04 15:18:47:233 - [7664:86] - ERROR - MyHelper.ExceptionHandling.GlobalExceptionLogger - WebAPI exception : System.AggregateException: One or more errors occurred. ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> 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 104.42.136.180:443 
    at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult) 
    at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception) 
    --- End of inner exception stack trace --- 
    at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) 
    at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar) 
    --- End of inner exception stack trace --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.Rest.RetryDelegatingHandler.<>c__DisplayClass11_0.<<SendAsync>b__1>d.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.Rest.RetryDelegatingHandler.<SendAsync>d__11.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.Azure.KeyVault.KeyVaultClient.<GetSecretWithHttpMessagesAsync>d__61.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.Azure.KeyVault.KeyVaultClientExtensions.<GetSecretAsync>d__11.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Common.KeyVaultReader.KeyVaultHelper.<>c__DisplayClass7_0.<<GetSecret>b__0>d.MoveNext() 
    --- End of inner exception stack trace --- 
    at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification) 
    at Common.KeyVaultReader.KeyVaultHelper.GetSecret(String secretName) 
    at Common.Authentication.Entitlement.EntitleAttribute.CheckFeatureSupported(String strToken, List`1 features) 
    at System.Web.Http.AuthorizeAttribute.OnAuthorization(HttpActionContext actionContext) 
    at System.Web.Http.Filters.AuthorizationFilterAttribute.OnAuthorizationAsync(HttpActionContext actionContext, CancellationToken cancellationToken) 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext() 
---> (Inner Exception #0) System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> 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 104.42.136.180:443 
    at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult) 
    at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception) 
    --- End of inner exception stack trace --- 
    at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) 
    at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar) 
    --- End of inner exception stack trace --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.Rest.RetryDelegatingHandler.<>c__DisplayClass11_0.<<SendAsync>b__1>d.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.Rest.RetryDelegatingHandler.<SendAsync>d__11.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.Azure.KeyVault.KeyVaultClient.<GetSecretWithHttpMessagesAsync>d__61.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Microsoft.Azure.KeyVault.KeyVaultClientExtensions.<GetSecretAsync>d__11.MoveNext() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
    at Common.KeyVaultReader.KeyVaultHelper.<>c__DisplayClass7_0.<<GetSecret>b__0>d.MoveNext()<---

來源

2017-10-04 ashwin

如果你設置更好的日誌記錄，這將有所幫助。它可能會拋出一個'AggregateException'。那個包含導致它的實際異常。如果你試着捕獲AggregateException，你可以記錄內部異常。 – juunas

@juunas我已經加入了aggregateexception日誌。感謝您指出。 – ashwin

我們無法弄清楚什麼問題是。但由於keyvault接入作品最初和失效後才約40/50來電，我們決定使用system.runtime.caching.memorycache

這似乎是解決問題緩存的祕密。

但是出現了關於keyvault訪問限制的問題。 keyvault對同時訪問祕密有限制嗎？

來源

2017-10-06 03:59:11 ashwin

訪問從webAPI調用GetSecretAsync時發生零星500錯誤

回答

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