SQL 2005: Pooling, Application Roles And SQL Server Error 18059

Nov 24, 2007

Hi all:

[Posting this in the security forum because in this forum I found a related post.]

I have a problem with SQL Server 2005 and application roles and pooling. I needed to use application roles and I needed to use pooling at the same time for an application. I am using sp_setapprole and sp_unsetapprole. In order to ensure that the application role is always set and unset by the application, I actually developed a custom Data Provider based on the SqlClient Data Provider. I have a custom Connection and Command class that wrap the SqlClient versions. Upon opening my custom Connection class, I execute the sp_setapprole stored procedure. Upon closing or disposing the connection, I call sp_unsetapprole.

This works fine in 99% of my tests. However, I have three or four methods (always the same ones, but one only fails ever so often) that fail, but only under the following circumstances:


Pooling is turned on (but pool size doesn't matter)

I am using my custom Data Provider (using System.Data.SqlClient does not cause this issue... but I am also not using approles then)

When other tests have run in the same test run. I.e. when I run the failing methods by themselves in a test run, there is no problem.
So it seems to me that the problem is related to using application roles with pooling turned on. For scalability reasons, we cannot turn pooling off. When the methods fail, I see the following two (2) entries in the SQL Log:


Error: 18059, Severity: 20, State 1.

The connection has been dropped because the principal that opened it subsequently assumed a new security context, and then tried to reset the connection under its impersonated security context. This scenario is not supported. See "Impersonation Overview" in Books Online.
I understand the error message somewhat. However, I am not sure why the "reset" of the connection occurs. My code does not call reset anywhere, so it must be something that happens in the background.

I am reviewing code to see if there is possibly a situation where the sp_unsetapprole procedure does not get called or does not get called successfully, but there is a lot of code (in many custom components).

I would like to know if anyone has a suggestion on how to solve this problem, or, find the code that may be causing the problem.

Thanks in advance,

SA.

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Application Roles In SQL 2005

Jun 13, 2006

We have an an application that was written using OLE DB (ADO) against a SQL 2000 Server that uses an Application role to give rights to the database objects. It connects, calls sp_setapprole and goes on. If the database needs to LOCK a record, it is creating a new ADO Connection and instantiating the Approle again. This model has been working fine up til now.

Now we are installing a SQL 2005 server for the latest version of the product we are working on and are running into an error. The error is
Error: 18059, Severity: 20, State: 1.
The connection has been dropped because the principal that opened it subsequently assumed a new security context, and then tried to reset the connection under its impersonated security context. This scenario is not supported. See "Impersonation Overview" in Books Online.


It's happening when the second ADO Connection for locking a record is being created and the sp_setapprole is being executed.

One of my questions is what is the problem with executing the approle on a different connection? Our code has not changed, so obviously SQL 2005 is doing something different. The other is What can we do to correct this?

Is the resource pooling different? We had problems in the beginning with approles and figured out through research that we needed to add OLE DB Services=-2 to the connection string to turn off resource pooling.

Is there an extra step to using Approles in SQL 2005?

Any help would be greatly appreciated as we need to resolve this ASAP.



Thanks,

David

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Code Snippet

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c:windowssystem32inetsrv> "C:WINDOWSMicrosoft.NETFrameworkv2.0.50727csc.exe" /t:library /utf8output /R:"C:WINDOWSassemblyGAC_32System.Web2.0.0.0__b03f5f7f11d50a3aSystem.Web.dll" /R:"C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files
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eports2cbaf422c4330628assemblydl3cd47089b0f2a80e_f54cc701Microsoft.ReportingServices.Interfaces.DLL" /R:"C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files
eports2cbaf422c4330628assemblydl3f180608d0083daf_b16dc701Microsoft.ReportingServices.Diagnostics.DLL" /R:"C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files
eports2cbaf422c4330628assemblydl323449648068591f_f54cc701ReportingServicesNativeClient.DLL" /out:"C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files
eports2cbaf422c4330628App_global.asax.th5hkjqv.dll" /debug- /optimize+ /w:4 /nowarn:1659;1699;1701 "C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files
eports2cbaf422c4330628App_global.asax.th5hkjqv.0.cs" "C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files
eports2cbaf422c4330628App_global.asax.th5hkjqv.1.cs"


Microsoft (R) Visual C# 2005 Compiler version 8.00.50727.1433
for Microsoft (R) Windows (R) 2005 Framework version 2.0.50727
Copyright (C) Microsoft Corporation 2001-2005. All rights reserved.

error CS0016: Could not write to output file 'c:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files
eports2cbaf422c4330628App_global.asax.th5hkjqv.dll' -- 'The directory name is invalid. '








Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433

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SQLCe Errors When Doing Developing A SQL Mobile Application With Visual Studio 2005 And SQL Server 2005 Tutorial

Feb 26, 2008

I'm attempting to use RDA to synchronize a pocket pc emulator with SQL Server 2005 database by following tutorial http://msdn2.microsoft.com/en-us/library/aa454892.aspx, which uses AdvWorksMobile database that comes with SQL Server 2005.

When get to testing of "To test application features " ( step 4 of the merge replication setup lab ), I am receiving SQLCe Exception errors.

ORIGINALLY, I was able to deploy an application and view the local database on the emulator, but once I clicked "InitSinc" button, I received an error.

"Failure to connect to SQL Server with provided connection information. SQL Server does not" exist, access is denied because the SQL user is not a valid user on the SQL Server, or the password is incorrect.
Found this error listed in Server Agent Errors log http://technet.microsoft.com/en-us/library/ms172357.aspx, but it wasn't very helpful since it doesn't provide any suggestions on fixing the problems.

I am brand new to SQL CE Server , mobile programming and .NET framework in general so please bare with me



All the connections / security settings, etc that were set up were taken from a tutorial so I am not sure what SQLCeServer is complaining about. Reading up on the error on the web didn't help, it all pointed to making sure that the snapshot folder had correct permissions set up. I verified that MACHINENAMEUISR_MACHINENAME guest user had Read rights to the database so I don't think that piece is the problem. Otherwise ,Merge publication has been setup in Microsoft SQL Server Management Studio by following the tutorial.


I am trying to run this sync on my home pc so there should be no issues with any user permissions


I have IIS installed


I did NOT have SQL Server Agent running in management studio at this time


I am trying to run this tutorial on an XP machine, which is my regular home PC so I dont think there are any special networking settings to consider


I am able to hit http://localhost/AdvWorksMobile/sqlcesa30.dll from my pc OK, but when I try to hit it from a cradled emulator ( after replacing "localhost" with "MACHINE_NAME" ), Internet Explorer on the emulator gives me a "Cannot Connect With Current Settings" error message. This part wasn't part of tutorial but decided so not sure if I am supposed to be able to hit it from my emulator..so I am not sure if the fact that I can't hit it is related to the problem.
AFTER STARTING SQL SERVER AGENTin Microsoft SQL Server Management Studio, I killed the application, and after relaunching it, it hits "The Specified table does not exist [Vendor]" error. This time it doesn't even launch first - that is I dont even get to pressing "InitSinc" button. Debugger is showing that this error is hit on the following line in AdvWorksMobile.AddWorksDataSetTableAdapters

int returnValue = this.Adapter.Fill(dataTable);

I am not sure why the errors changed on me after starting SQL Server Agent.
What can I do to fix this connection problem?

Thank you so much for your help!

Irina


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Problem With One Application With The Error:26 - Error Locating Server/instance Specified

Nov 9, 2007



Hello all!

I have been researching this problem on the net. I have everything setup, here is the wierd part. I did a test windows application, and that application connects into my database just fine. I have SQL DEV 2005, everything is on my laptop. I have websites that I have wrote that connects fine.

I have application that give me this error. Now the only thing is that I wrote this windows app on a diffrent machine, with a diffrent SQL 2005 server. I had to move everything on my laptop, so I can finish on site at the clients place. So I grabbed the project, copied it over, and opened it on my laptop. No problems. I created a new database, scripted everything from the other server, and ran those scripts on my laptop to create the tables, SP etc.

Now my test application I created on my laptop, I can connect to the databse just fine with this string.

<add name="TestDataGrid.My.MySettings.TestConnectionString"

connectionString="Data Source=MKE01-2N92461;Initial Catalog=TestDB;Integrated Security=True"

providerName="System.Data.SqlClient" />

I can also connect to the database that I brought over from the other server. Could there be somthing with the Datasets, or something like that?
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Rudy

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Apr 13, 2008

have SQL Server 2005 std edition SP1 installed on Windows 2003 Std edition .Configured Transactional (single Publisher and no clustered environment.)
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Hi, I have developed a website in asp.net 2. I have tester it and it is working fine on my computer but when I have uploaded it to my server I'm getting an error message when the user signup. The error occurs when I'm setting the user role to 'members'.
 
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To double check that my code is not generating the error I have lonched 'SQL Query Analizer' and executed the folowing code on my database:
NOTE: In my database I have create the user “teeluk12� and a role “members�
 
aspnet_UsersInRoles_AddUsersToRoles "/", "teeluk12", "members", "5/02/2006 4:44:33 pm"
 
Once again the code is working on my home computer but not on the server. On the server I'm getting the following error:
 
Server: Msg 446, Level 16, State 9, Procedure aspnet_UsersInRoles_AddUsersToRoles, Line 76
Cannot resolve collation conflict for equal to operation.
 
 
 
Does anybody know what could cause the error?
Could it be some permissions that I didn't set on my server?
 
 
Thanks for my help and suggestions...
Regards,
Gonzal
 

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