Trouble Enumerating SQL Server Instances With SQL 2000/2005 On Network
Dec 4, 2007
Hi,
We have (after several weeks of testing in all kind of environments) send out a new version of our application to several of our customers. Within days problems where drippin in; After looking for the problem on various customer situations we found a problem which I think is rather disturbing and very odd. I'll describe the situation, on which we finally managed to recreate the problem, here.
In my problem I use the following configuration:
Windows 2003 (standard edition) AD network with 2 domain controllers, multiple Windows XP workstations, some without SQL instances, some with SQL 2000 instances, some with SQL 2005 instances and even one with SQL 7 running.
All run a 32 bit OS.
Tools to reproduce:
ListSQLSvr application (found on SQLDev.net) to enumerate the instances.
Problem description:
--------------------------------------------------
I am running the machine called DEV001, which has SQL 2000 (instancename DRUMIS) and SQL 7.0 (has no instancename so this is the root instance) installed.
In any 'normal' situation all the runnings SQL instances are visible on the network like this:
Code Block
C:>listsqlsvr -X
(local);Clustered:No;Version:7.00.623
ADM002DRUMIS;Clustered:No;Version:8.00.194
DEV001DRUMIS
DEV001DRUMIS;Clustered:No;Version:8.00.194
DEV002DRUMIS;Clustered:No;Version:8.00.194
DEV002EXPRESS;Clustered:No;Version:9.00.3042.00
DEV002EXPRESS
INSADBACKOFFICEDRUMIS;Clustered:No;Version:8.00.194
INSADBACKOFFICEEXACT;Clustered:No;Version:9.00.3042.00
INSADOFFICEWSUS;Clustered:No;Version:8.00.194
SUP001DRUMIS;Clustered:No;Version:8.00.194
When I turn the SQL 2005 Browser service off on the machine called DEV002 the list looks like:
Code Block
C:>listsqlsvr -X
(local);Clustered:No;Version:7.00.623
ADM002DRUMIS;Clustered:No;Version:8.00.194
DEV001DRUMIS;Clustered:No;Version:8.00.194
DEV001DRUMIS
DEV002
DEV002EXPRESS
DEV004DRUMIS;Clustered:No;Version:9.00.3042.00
INSADBACKOFFICEDRUMIS;Clustered:No;Version:8.00.194
INSADBACKOFFICEEXACT;Clustered:No;Version:9.00.3042.00
INSADOFFICEWSUS;Clustered:No;Version:8.00.194
SUP001DRUMIS;Clustered:No;Version:8.00.194
Notice that the browser service might be off on DEV002, you can still see the EXPRESS instance and a new root instance has appeared (though it doesn't exist!)??
After restarting the Browser service all is OK again.
When I turn on Hide Server in the SQL 2000 TCP/IP properties (or turn it on in the registry [HKEY_LOCAL_MACHINESOFTWAREMicrosoftMicrosoft SQL ServerDRUMISMSSQLServerSuperSocketNetLibTcp] "TcpHideFlag"=dword:00000001) on the DEV002 computer something real scary is happening..
The list looks as follows:
Code Block
C:listsqlsvr -X
(local)
ADM002
DEV001
DEV002
DEV004
INSADBACKOFFICE
INSADOFFICE
SUP001
When someone has entered a database (for example the backoffice database on INSADBACKOFFICEEXACT) the list looks as follows (for a short moment; 5 secs or so):
Code Block
C:listsqlsvr -X
(local)
ADM002
DEV001
DEV002
DEV004
INSADBACKOFFICEDEVELOP;Clustered:No;Version:8.00.194
INSADBACKOFFICEDRUMIS;Clustered:No;Version:8.00.194
INSADBACKOFFICEEXACT;Clustered:No;Version:9.00.3042.00
INSADOFFICE
SUP001
Notice now that ALL instances are gone and no extended information is available. In the Query Analyser and in the SQL Management Studio when browsing you'll see this as well!
When someone is accessing a database instance it appears for a few seconds again.
Since our installation and applications rely on selecting a existing instance it will fail in the above situations (or at least not showing all available instances).
In my opinion this is a bug somewhere!
Note that even when the SQL Services are stopped on DEV002 (leaving the Browser service running) it still seems to block out ALL instance on the ENTIRE network!
I don't mind that one INSTANCE or even the entire MACHINE is hidden from the network, but ALL instances on ALL machines??
And the SQL Browser issue also worries me a bit since it does not stop the possibily to browse the SQL instances; it removes the SQL2000 instances but adds a root instance which doesn't even exist! Also the extended info is stripped.
Can anyone help me solve this/advise?
Also mind that in any situation there might run a lot of computers with a lot of SQL instances and I cannot tell our customers to find which machine has the SQL TCP/IP properties set to Hide...
It even seems that in some situations SBS 2003 does the hiding automatically on Install? And if so, when and why?
Regards,
Albert van Peppen
Senior System Engineer
Insad Grafisch b.v.
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Sep 3, 2007
Hi,
I have a problem enumerating SQL server instances on a 64 bits server W2K3 R2 SP2, running SQL 2000 sp4 (32 bits), SQL 2005 Express sp2 (32 bits) and SQL 2005 Developer sp2 (64 bits).
I am using the same way as the sample (found on SQLDev.net) ListSQLSvr application to enumerate the instances.
In my case i have the following instances defined:
MYPC - SQL 2000 (32 bits) (default) instance
MYPCEXPRESS - SQL 2005 Express (32 bits) instance
MYPCSQL2K5X64 - SQL 2005 Developer (64 bits) instance
When i enumerate the SQL instances for the entire network like this:
ListSQLSvr -X
All instances appear (including the instances from other machines in the network, as expected)
When i enumerate the SQL instances on my local machine like this:
ListSQLSvr -S MYPC -X
Only the 32 bits instances appear..
When compiling the ListSQLSvr application to target 64 bit, the result on the local macine shows only the 64 bits instances !?!?
I am using this enumerating code in my installer to fill a listbox and depending on what kind of SQL instance (32 or 64 bits) is selected by the user, I install the correct extended stored procedure and register accourdingly (note the difference between a 32 extended Proc and a 64 bit extended Proc).
In this case I only need the local SQL instances since i want to install the correct extended proc.
Since the installer (MSI file) is one-for-all (32 and 64 bits OS's) it runs the code from a Custom Action DLL in 32 bits. Resulting in showing only the 32 bits instances.
When I would use the 64 bit installer and make my CA DLL to target 64 bits, I would only see the 64 bits instances.
But i would like to see and use all instances in my 32 bit installer and take the appropriate action to install the correct extended Proc.
I think it has to do with some internals of ODBC (SQLBrowseConnect() most likely); When using a local enumeration it uses Shared Memory and when enumerating the entire network (or any other machine) it uses TCP/IP?
If this is true, is there a way to bypass this someway?
Or if this isn't true, does anyone know any solution to the problem described?
Regards,
Albert van Peppen
Senior System Engineer
Insad Grafisch b.v.
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SQL Express Response
.Q.ServerName;DDK7P4D1;InstanceName;SQLEXPRESS;IsClustered;No;Version;9.00.1399.06;;
MSDE Response
...ServerName;RED;InstanceName;SECOND;IsClustered;No;Version;8.00.194;tcp;4307;;Ser
verName;RED;InstanceName;THIRD;IsClustered;No;Version;8.00.194;tcp;0;;Server
Name;RED;InstanceName;MSSQLSERVER;IsClustered;No;Version;8.00.194;tcp;4303;;
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network and only the SQL Express named instance appears in the list. The second the SQL Express box is removed
from the network the named instances are visible. I monitored the UDP traffic and suspect there is an issue with the response from SQL Express to OSQL. Can't find any issues for this problem only report I found is if MSDE and Express are on the same machine.
SQL Express Response
.Q.ServerName;DDK7P4D1;InstanceName;SQLEXPRESS;IsClustered;No;Version;9.00.1399.06;;
MSDE Response
...ServerName;RED;InstanceName;SECOND;IsClustered;No;Version;8.00.194;tcp;4307;;Ser
verName;RED;InstanceName;THIRD;IsClustered;No;Version;8.00.194;tcp;0;;Server
Name;RED;InstanceName;MSSQLSERVER;IsClustered;No;Version;8.00.194;tcp;4303;;
Any ideas?
Thanks, Kevin.
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Aug 19, 2007
I just installed sql server 2005 and trying to pick it up before I start a new job as a developer using sql server 2005. The problem is that I have three instances installed, the one that works was installed prior to installing sql server 2005 when I installed System Architect a CASE tool which utilizes sql server for its encyclopedias.
My initial installed I used the default settings with the default instance and that does not work. I later ran set up again and installed another instance and that does not work. For some apparent reason the POKIN10SQL instance is over riding everything rendering every other instance non-functional.
When I try to connect to the one of the other instances, the error message is
"An error has occured while establishing a connection to the server. When connection to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL does not allow remote connections. (Provider Network Interface, error: 26 - Error locating Server/Instance Specified) (Microsoft SQL Server)"
I don't think the remote connection is the problem as I went into the properties settings and checked the connection settings and allow remote connections is checked.
In terms of locating the instance, I installed SQL Server as specified in the handbook ... with the default instance and then a named instance.
Something seems to be wrong with the POKIN10SQL instance which was installed with System Architect, I need System Architect so I need a work around rather then an uninstall.
Can someone help please?
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