[Win32Exception (0x80004005): 系统找不到指定的文件。]
[SqlException (0x80131904): 在与 SQL Server 建立连接时出现与网络相关的或特定于实例的错误。未找到或无法访问服务器。请验证实例名称是否正确并且 SQL Server 已配置为允许远程连接。 (provider: Named Pipes Provider, error: 40 - 无法打开到 SQL Server 的连接)]
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +345
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +156
System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +258
System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +312
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +202
System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +413
System.Data.SqlClient.SqlConnection.Open() +128
Discuz.Data.DbHelper.ExecuteDataset(DbConnection connection, CommandType commandType, String commandText, DbParameter[] commandParameters) +92
Discuz.Data.DbHelper.ExecuteDataset(CommandType commandType, String commandText, DbParameter[] commandParameters) +116
Discuz.Data.SqlServer.DataProvider.GetOnlineUserByIP(Int32 userId, String ip) +372
Discuz.Data.OnlineUsers.GetOnlineUserByIP(Int32 userid, String ip) +112
Discuz.Forum.OnlineUsers.UpdateInfo(String passwordkey, Int32 timeout, Int32 uid, String passwd) +458
Discuz.Forum.PageBase..ctor() +2144
Discuz.Web.UI.RssPage..ctor() +18
ASP.tools_rss_aspx..ctor() in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\443445f6\477f4ac4\App_Web_rss.aspx.c80ba202.g4_tzgfd.0.cs:0
__ASP.FastObjectFactory_app_web_rss_aspx_c80ba202_g4_tzgfd.Create_ASP_tools_rss_aspx() in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\443445f6\477f4ac4\App_Web_rss.aspx.c80ba202.g4_tzgfd.1.cs:0
System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp) +132
System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +44
System.Web.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +375
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +195
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +128
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