我在连接到 SQL Server 2012 远程实例的服务时遇到问题。
.NET 2.0 服务在客户端计算机上运行,它使用 TCP/IP 连接到当前正在运行 SQL Server 2012 实例的远程 Web 服务器。Web 服务器曾经是 Windows Server 2003 和 SQL Server 2005,并已升级 6几个月前没有任何问题。然后,该服务会检查是否有任何需要下载的数据。
客户端机器
- 视窗服务器 2003
网络服务器
- 视窗服务器 2012
- SQL Server 2012
这运行良好 5 年多,直到上周五突然停止工作并给出以下错误日志消息
Event Type: Warning
Event Source:
Event Category: None
Event ID: 0
Date: 21/05/2013
Time: 16:45:11
User: N/A
Computer:
Description:
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.ReadSniError(TdsParserStateObject stateObj, UInt32 error)
at System.Data.SqlClient.TdsParserStateObject.ReadSni(DbAsyncResult asyncResult, TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.ReadNetworkPacket()
at System.Data.SqlClient.TdsParserStateObject.ReadByteArray(Byte[] buff, Int32 offset, Int32 len)
at System.Data.SqlClient.TdsParserStateObject.ReadUInt32()
at System.Data.SqlClient.TdsParser.ReadSqlValueInternal(SqlBuffer value, Byte tdsType, Int32 typeId, Int32 length, TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.ReadSqlValue(SqlBuffer value, SqlMetaDataPriv md, Int32 length, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ReadColumnData()
at System.Data.SqlClient.SqlDataReader.ReadColumnHeader(Int32 i)
at System.Data.SqlClient.SqlDataReader.ReadColumn(Int32 i, Boolean setTimeout)
at System.Data.SqlClient.SqlDataReader.GetValueInternal(Int32 i)
at System.Data.SqlClient.SqlDataReader.GetValue(Int32 i)
at RedBlack.Data.Synchronisation.SyncManager.UpsertRecords(String sourceSelect, String destTable, String[] destFields, List`1 relations)
at General.CyPro.Application.WebSynchronisation.SyncRoutines.FetchOrders(UpsertFlags upsertOptions)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at RedBlack.CyPro.Application.WebSynchronisation.Job.Run(Object[] args)
...
System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.ReadSniError(TdsParserStateObject stateObj, UInt32 error)
at System.Data.SqlClient.TdsParserStateObject.ReadSni(DbAsyncResult asyncResult, TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.ReadNetworkPacket()
at System.Data.SqlClient.TdsParserStateObject.ReadByteArray(Byte[] buff, Int32 offset, Int32 len)
at System.Data.SqlClient.TdsParserStateObject.ReadUInt32()
at System.Data.SqlClient.TdsParser.ReadSqlValueInternal(SqlBuffer value, Byte tdsType, Int32 typeId, Int32 length, TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.ReadSqlValue(SqlBuffer value, SqlMetaDataPriv md, Int32 length, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ReadColumnData()
at System.Data.SqlClient.SqlDataReader.ReadColumnHeader(Int32 i)
at System.Data.SqlClient.SqlDataReader.ReadColumn(Int32 i, Boolean setTimeout)
at System.Data.SqlClient.SqlDataReader.GetValueInternal(Int32 i)
at System.Data.SqlClient.SqlDataReader.GetValue(Int32 i)
at RedBlack.Data.Synchronisation.SyncManager.UpsertRecords(String sourceSelect, String destTable, String[] destFields, List`1 relations)
at General.CyPro.Application.WebSynchronisation.SyncRoutines.FetchOrders(UpsertFlags upsertOptions)
我检查了 Web 服务器上的活动监视器,当查询运行时,它被挂起,WAIT_TYPE 为 ASYNC_NETWORK_IO。
我已经运行了它试图在远程连接到 Web 服务器实例的客户端服务器上的 Management Studio 中手动运行的查询,它运行了大约 40 秒,返回了 2600+ 行,然后它给了我以下错误
Msg 121, Level 20, State 0, Line 0
A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The semaphore timeout period has expired.)
我在 Management Studio 中远程连接到 Web 服务器实例的机器上运行了相同的查询,它在 0.312 秒内返回完整的 4000 行。
我试图弄清楚这一点不知所措,因为在我看来这是某种网络问题。客户硬件技术人员检查了网络,并表示就他们而言一切都很好。
如果您需要更多信息,请告诉我
谢谢