以本地系统用户身份运行时，尝试使用C＃SqlConnect连接后，LocalDB实例消失了

时间：2019-07-05 15:04:40

标签： c# sql-server sql-server-express localdb

我们正在考虑将LocalDB用于生产中的应用程序。由于我们的服务和Web应用程序以LOCAL_SYSTEM服务的身份运行，因此也有可能以LOCAL_SYSTEM身份运行localdb实例。

我已经测试了一段时间，并且遇到了多个问题。在多台机器上进行了测试，仅x64 OS。

使用x64安装程序的SQL Server v12 / 2014 Express LocalDB。 v14 / 2017提供了相同的结果。没有在x64操作系统上运行的x86安装程序。

C:\Temp>echo %username%
lan

C:\Temp>psexec.exe -s cmd.exe

PsExec v2.2 - Execute processes remotely
Copyright (C) 2001-2016 Mark Russinovich
Sysinternals - www.sysinternals.com


Microsoft Windows [Version 10.0.18362.175]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\Windows\system32>cd c:\Temp

c:\Temp>echo %username%
TSTWCD03$

c:\Temp>SQLLocalDB create MyInstance
LocalDB instance "MyInstance" created with version 12.0.2000.8.

c:\Temp>SQLLocalDB start MyInstance
LocalDB instance "MyInstance" started.

c:\Temp>sqlcmd -S "(localdb)\MyInstance" -Q "SELECT GETDATE()"

-----------------------
2019-07-05 16:37:00.043

(1 rows affected)

因此实例现在已经清楚地在运行。.让我们尝试使用我的x64 C＃构建应用程序进行连接：

c:\Temp>ODBCTest_x64
Connect using SQL: Data Source = (localdb)\MyInstance; Integrated Security = True; Connect Timeout = 10;
SQLCONN State: Open

c:\Temp>SQLLocalDB info MyInstance
Name:               MyInstance
Version:            12.0.2000.8
Shared name:
Owner:              NT AUTHORITY\SYSTEM
Auto-create:        No
State:              Running
Last start time:    05/07/2019 16:36:36
Instance pipe name: np:\\.\pipe\LOCALDB#F3826724\tsql\query

c:\Temp>dir "C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\MyInstance"
 Volume in drive C has no label.
 Volume Serial Number is BC82-AA93

 Directory of C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\MyInstance

05/07/2019  16:36    <DIR>          .
05/07/2019  16:36    <DIR>          ..
05/07/2019  16:36                 0 error.log
05/07/2019  16:36            12.030 error1.log
05/07/2019  16:36                 0 error2.log
05/07/2019  16:36         1.048.576 log.trc
05/07/2019  16:36                 0 log_1.trc
05/07/2019  16:36         4.194.304 master.mdf
05/07/2019  16:36         2.097.152 mastlog.ldf
05/07/2019  16:36         2.293.760 model.mdf
05/07/2019  16:36           524.288 modellog.ldf
05/07/2019  16:36        13.434.880 msdbdata.mdf
05/07/2019  16:36           524.288 msdblog.ldf
05/07/2019  16:36            73.728 system_health_0_132068109699630000.xel
05/07/2019  16:36                 0 system_health_0_132068109978530000.xel
05/07/2019  16:36         2.293.760 tempdb.mdf
05/07/2019  16:36           516.096 templog.ldf
              15 File(s)     27.012.862 bytes
               2 Dir(s)  59.358.416.896 bytes free

使用x64 SqlConnection连接成功。

但是我们的服务作为x86应用程序运行... 

c:\Temp>ODBCTest_x86
Connect using SQL: Data Source = (localdb)\MyInstance; Integrated Security = True; Connect Timeout = 10;
  

未处理的异常：System.Data.SqlClient.SqlException：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。验证实例名称正确，并且已将SQL Server配置为允许远程连接。 （提供者：SQL网络接口，错误：50-发生本地数据库运行时错误。指定的LocalDB实例不存在。）

     在System.Data.SqlClient.SqlInternalConnectionTds..ctor中的

，SqlAuthenticationProviderManager sqlAuthProviderManager）
  在System.Data.SqlClient.SqlConnectionFactory.CreateConnection（DbConnectionOptions选项，DbConnectionPoolKey poolKey，对象poolGroupProviderInfo，DbConnectionPool池，DbConnection owningConnection，DbConnectionOptions userOptions）
  在System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection处（DbConnectionPool池，DbConnection owningObject，DbConnectionOptions选项，DbConnectionPoolKey poolKey，DbConnectionOptions userOptions）
  在System.Data.ProviderBase.DbConnectionPool.CreateObject（DbConnection owningObject，DbConnectionOptions userOptions，DbConnectionInternal oldConnection）
  在System.Data.ProviderBase.DbConnectionPool.UserCreateRequest（DbConnection owningObject，DbConnectionOptions userOptions，DbConnectionInternal oldConnection）
  在System.Data.ProviderBase.DbConnectionPool.TryGetConnection（DbConnection owningObject，UInt32 waitForMultipleObjectsTimeout，布尔值allowCreate，仅布尔值OneCheckConnection，DbConnectionOptions userOptions，DbConnectionInternal＆连接）
  在System.Data.ProviderBase.DbConnectionPool.TryGetConnection（DbConnection owningObject，TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource 1重试，DbConnectionOptions userOptions，DbConnectionInternal oldConnection，DbConnectionInternal＆连接）处
  在System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal（DbConnection externalConnection，DbConnectionFactory connectionFactory，TaskCompletionSource 1 retry, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource 1重试，DbConnectionOptions userOptions）处
  在System.Data.SqlClient.SqlConnection.TryOpenInner（TaskCompletionSource 1 retry)
at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource 1重试）
  在System.Data.SqlClient.SqlConnection.Open（）处
  在ODBCTest.Program.Main（String [] args）

c:\Temp>SQLLocalDB info MyInstance
Printing of LocalDB instance "MyInstance" information failed because of the following error:
LocalDB instance "MyInstance" doesn't exist!

c:\Temp>dir "C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\MyInstance"
 Volume in drive C has no label.
 Volume Serial Number is BC82-AA93

 Directory of C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\MyInstance

05/07/2019  16:36    <DIR>          .
05/07/2019  16:36    <DIR>          ..
05/07/2019  16:36                 0 error.log
05/07/2019  16:36            12.030 error1.log
05/07/2019  16:36                 0 error2.log
05/07/2019  16:36         1.048.576 log.trc
05/07/2019  16:36                 0 log_1.trc
05/07/2019  16:36         4.194.304 master.mdf
05/07/2019  16:36         2.097.152 mastlog.ldf
05/07/2019  16:36         2.293.760 model.mdf
05/07/2019  16:36           524.288 modellog.ldf
05/07/2019  16:36        13.434.880 msdbdata.mdf
05/07/2019  16:36           524.288 msdblog.ldf
05/07/2019  16:36            73.728 system_health_0_132068109699630000.xel
05/07/2019  16:36                 0 system_health_0_132068109978530000.xel
05/07/2019  16:36         2.293.760 tempdb.mdf
05/07/2019  16:36           516.096 templog.ldf
              15 File(s)     27.012.862 bytes
               2 Dir(s)  59.358.351.360 bytes free

发生了WTF吗？与我的x64 SQL LocalDB的x86 SqlConnection刚刚杀死了我的实例……在一个实例中！

c:\Temp>SQLLocalDB create MyInstance
LocalDB instance "MyInstance" created with version 12.0.2000.8.

c:\Temp>SQLLocalDB start MyInstance
LocalDB instance "MyInstance" started.

c:\Temp>SQLLocalDB info MyInstance
Name:               MyInstance
Version:            12.0.2000.8
Shared name:
Owner:              NT AUTHORITY\SYSTEM
Auto-create:        No
State:              Running
Last start time:    05/07/2019 16:53:13
Instance pipe name: np:\\.\pipe\LOCALDB#23C9D1D8\tsql\query

c:\Temp>ODBCTest_x64
Connect using SQL: Data Source=np:\\.\pipe\LOCALDB#23C9D1D8\tsql\query; Integrated Security=True; Connect Timeout=10;
SQLCONN State: Open

c:\Temp>ODBCTest_x86
Connect using SQL: Data Source=np:\\.\pipe\LOCALDB#23C9D1D8\tsql\query; Integrated Security=True; Connect Timeout=10;
SQLCONN State: Open

使用实例管道名称进行连接确实可行！

当LocalDB实例作为LOCAL_SYSTEM运行时，事件日志向我显示此错误：

  

LocalDB实例注册表项中缺少“ DataDirectory”注册表值：{F3917303-37C0-418C-8551-390A6E46EEC3}

使用管道名称可能会起作用，但是我真的更喜欢使用实例名称。关于使用x86库调用时为何失败的任何提示？

0 个答案:

没有答案
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