将 Azure 与 SQL Server 结合使用。在隐式调用 SimpleRoleProvider 的 30% 情况下，我们会收到错误：命名管道提供程序，错误：40 - 无法打开与 SQL Server 的连接。该错误经常发生但不可重现。好像超时了。。
[Authorize(Roles = "Administrator")]
public class AdminController : Controller
{
...
}
堆栈跟踪如下所示：
[Win32Exception (0x80004005): Access is denied]
[SqlException (0x80131904)：建立与 SQL Server 的连接时发生与网络相关或特定于实例的错误。服务器未找到或无法访问。验证实例名称是否正确以及 SQL Server 是否配置为允许远程连接。（提供者：命名管道提供者，错误：40 - 无法打开与 SQL Server 的连接）] System.Data.SqlClient.SqlInternalConnection.OnError（SqlException 异常，布尔 breakConnection，操作1 wrapCloseInAction) +5296071
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +558
System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover) +5308555
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) +145
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) +889
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) +307
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions) +434
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +225
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) +37
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnectionOptions userOptions) +558
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnectionOptions userOptions) +67
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +1052
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource1 重试，DbConnectionOptions userOptions，DbConnectionInternal& 连接）+78 系统.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +167
System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource1 次重试，DbConnectionOptions userOptions) +143 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 重试) +83 System.Data.SqlClient.SqlConnection.Open() +96 System.Web.DataAccess.SqlConnectionHolder.Open(HttpContext 上下文, Boolean revertImpersonate) +88 System.Web.DataAccess.SqlConnectionHelper.GetConnection(String connectionString, Boolean revertImpersonation) +239 System.Web.Security.SqlRoleProvider.GetRolesForUser(String username) +762 WebMatrix.WebData.SimpleRoleProvider.GetRolesForUser(String username) +54 System.Web.Security.RolePrincipal.IsInRole（字符串角色）+9461104
我们自己的服务器上没有这个问题。这是配置问题吗？我们正在使用 Azure 的免费试用版。
- - 添加 - -
坏事是 MVC 框架“处理”请求，在给出的示例中（角色管理）。框架的用途是增加一个抽象层来方便地处理“域请求”。那么在这种情况下该怎么办呢？
提前感谢您的帮助！