I have prepared a program with Visual Studio 2010 and I'm working with SQL Server 2008. Before 2 weeks ago, this connection was working properly. Now, I'm trying to use it again. When I'm clicking on the Connect button, it waits, and then gives this error:
A network-related or instance-specific error occurred while
establishing a connection to SQL Server. The server was not found or
is not accessible. Verify that the instance name is correct and that
SQL Server name is configured to allow remote connections. (provider:
SQL Network Interfaces, error: 26 - Error Locating Server/Instance
Specified.)
I googled this issue, but nothing helps.
I will be grateful to help me with this issue.
Do ensure that service is running. You can check this by writing this query on the query analyser as:-
IF EXISTS (SELECT 1 FROM sysprocesses WHERE LEFT(program_name, 8) = 'SQLAgent')
PRINT 'Running!'
ELSE
PRINT 'Not running';
From here:-
Make sure your server name is correct, e.g., no typo on the name.
Make sure your instance name is correct and there is actually such an instance on your target machine. [Update: Some application
converts \ to . If you are not sure about your application, please
try both Server\Instance and Server\Instance in your connection
string]
Make sure the server machine is reachable, e.g, DNS can be resolve correctly, you are able to ping the server (not always true).
Make sure SQL Browser service is running on the server. If firewall is enabled on the server, you need to put sqlbrowser.exe and/or UDP port 1434 into exception.
Open command prompt and execute this code:
For default instance : NET START MSSQLSERVER
For named instance : NET START MSSQL$
Related
In our company we use few AWS RDS MySQL instances while few of those aren't in any VPC (we have created those 3 years ago).
I need to connect to such an instance using Microsoft SQL Server Management Studio but when I'm trying to do so I'm getting following error after few seconds:
TITLE: Connect to Server
Cannot connect to host_path.amazonaws.com.
------------------------------ ADDITIONAL INFORMATION:
A network-related or instance-specific error occurred while
establishing a connection to SQL Server. The server was not found or
was not accessible. Verify that the instance name is correct and that
SQL Server is configured to allow remote connections. (provider: Named
Pipes Provider, error: 40 - Could not open a connection to SQL Server)
(Microsoft SQL Server, Error: 53)
For help, click:
http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=53&LinkId=20476
The network path was not found
If I add the port after the host path like described there
I'm getting different error:
TITLE: Connect to Server
Cannot connect to host_path.amazonaws.com,3306.
------------------------------ ADDITIONAL INFORMATION:
Internal connection fatal error. Error state: 18 (System.Data)
The thing is that the link above they are talking about DB instance that is within VPC but our isn't.
Did anyone of you stuck with similar issue earlier and maybe know how to resolve that or at least can point me out to the correct way?
I've Googled a lot regarding this issue but every forum or FAQ says about DB instance within VPC which isn't my case.
In screenshot below
you can see the connection window within the program, all sensitive data has been painted over.
Thank you in advance.
Pretty sure you cant directly connect from SSMS to a MySQL database. I think you can setup a "Linked Server" (basically an ODBC driver/datasource, then connect to your localhost, which in turn talks to MySQL).
See: https://learn.microsoft.com/en-us/sql/relational-databases/linked-servers/create-linked-servers-sql-server-database-engine?view=sql-server-2017
I'm assuming your requirement for SSMS is that you plan to reference data from both SQL Server and MySQL? If so, it should work, but its performance wont be great.
I have published the website on Arvixe system pointing to MySQL database.
When i try to access the website, its working fine, but somehow after some page accessing, it start giving the error as:
Server Error in '/' Application. A network-related or
instance-specific error occurred while establishing a connection to
SQL Server. The server was not found or was not accessible. Verify
that the instance name is correct and that SQL Server is configured to
allow remote connections. (provider: SQL Network Interfaces, error: 26
- Error Locating Server/Instance Specified)
I have pointed my website to MySQL database, but it is giving the error of SQl server.
For a check, when i run the website pointing to arxixe database from my local machine, its working absolutely perfect.
I have hosted the MySQL database onto Arvixe server itself.
Any help on this would be highly appreciated.
You will want to check 2 things:
1.You are using "localhost" or "127.0.0.1" in the connection string for the script on the server.
2.There may be another connection string in the code, that is connecting to the MSSQL server.
There is a 3rd option:
Contact Arvixe's support as they will have exact details of what would be happening.
Good luck!
When in try to start azure storage emulator i get the following error.
Caught exception while probing for SQL endpoint. A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) Number of Sql Errors Reported: 1 Sql Error: System.Data.SqlClient.SqlError: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
All the Components have been correctly installed .
Kindly Help
Thanx
I managed to fix it by deleting and creating my LocalDb instance. In my case it happened because I installed Azure SDK 2.2 over version 2.1.
The step-by-step to fix it:
Run sqllocaldb i to get your instance name:
C:\Users\myUser>sqllocaldb i
v11.0
Stop LocalDB instance:
C:\Users\myUser>sqllocaldb p v11.0
LocalDB instance "v11.0" stopped.
Delete your LocalDB instance:
C:\Users\myUser>sqllocaldb d v11.0
LocalDB instance "v11.0" deleted.
Create your LocalDB instance with the same name:
C:\Users\myUser>sqllocaldb c v11.0
LocalDB instance "v11.0" created with version 11.0.
Delete database files to allow emulator to recreate db files
C:\Users\myUser\DevelopmentStorageDb22.mdf
C:\Users\myUser\DevelopmentStorageDb22_log.ldf
That should fix your issues.
It looks like your windows account under which you logged in is not sysadmin in sqlexpress instance. Normally emulator uses database within sqlexpress with windows authentication.
The first time you run the Windows Azure storage emulator, an initialization process runs to configure the environment. By default, the initialization process creates a database in SQL Express LocalDB. So, please make sure that your SQLExpress service is running and your login have sufficient rights to use the database within SQLExpress.
If you want to make use of a local instance of an SQL Server to be used by Storage Emulator follow steps listed at http://msdn.microsoft.com/en-us/library/windowsazure/gg433134.aspx.
HTH
Sameer
What i am suspecting is that your LocalDB configuration with emulator is somehow corrupted or misconfigured.
Please follow the blog below to see if you can verify LocalDB instance is ready/working and it is used by Emulator:
http://blogs.msdn.com/b/avkashchauhan/archive/2012/07/10/windows-azure-sdk-1-7-storage-emulator-and-localdb.aspx
If you still have problem the easiest method would be to uninstall SDK 1.7 completely and re-install which will fix any issue with your configuration rather the finding the problem and try to fix which could take longer.
I was getting a similar message:
Probing SQL Instance: 'localhost\SQLExpress'.
Caught exception while probing for SQL endpoint. A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Number of SqlErrors Reported: 1
SqlError: System.Data.SqlClient.SqlError: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
No available SQL Instance was found.
One or more initialization actions have failed. Resolve these errors before attempting to run the storage emulator again.
Error: No available SQL Instance was found.
For me the problem was due to the fact that I was not running with administrator privileges.
Might be a little late to the party here, but I've seen this happen if you clear out or remove items in your "C:\Users[USER_NAME]\AppData\Local\Temp" folder.
At the time of writing this, Azurite is the replacement for "azure storage emulator". In my case, I was able to simply follow the steps here https://learn.microsoft.com/en-us/azure/storage/common/storage-use-azurite?tabs=npm#install-azurite to get it installed, and you should be good to go after that.
I am trying to connect remotely to SQL Server 2008 R2 Express on a server running Windows Server 2008 R2. I receive the following error:
A network-related or instance-specific error occurred while
establishing a connection to SQL Server. The server was not found or
was not accessible. Verify that the instance name is correct and that
SQL Server is configured to allow remote connections. (provider: TCP
Provider, error: 0 - A connection attempt failed because the connected
party did not properly respond after a period of time, or established
connection failed because connected host has failed to respond.)
I think the problem might be related to my connection string, because I am not sure exactly what it should be. I understand the connection string should take the form:
Data Source=123.123.123.123\InstanceName;Initial Catalog=MyDBName;user id=MyUserName;password=MyPassword;
The instance name of my SQL Server installation takes the form ComputerName\SQLEXPRESS. This is what I see when I log in to Management Studio on the server. So should the connection string begin with
Data Source=123.123.123.123\ComputerName\SQLEXPRESS
This looks wrong because of all the slashes. I have tried to omit the computer name thus:
Data Source=123.123.123.123\SQLEXPRESS
I also read somewhere that you can specify a port so I have also tried
Data Source=123.123.123.123,1433\SQLEXPRESS
because I understand that 1433 is the TCP port used by SQL Server and
Data Source=123.123.123.123,1434\SQLEXPRESS
because I understand that 1434 is the UDP port used by SQL Server browser.
I have also tried every combination of these and they all give the same error.
These are the steps I have taken to enable remote browsing on the server:
In Management Studio, right click the instance, go to Properties, Security and check SQL Server and Windows Authentication Mode. On the connections tab I have checked "Allow remote connections to this computer".
In SQL Server Configuration Manager I have enabled all four connection options (Shared Memory, Named Pipes, TCPIP and Via) under every node they occur. Under protocols for SQL Express I have tried specifying port 1433 and also leaving it blank with TCP Dynamic Ports set to 0 (which I think is meant to enable dynamic ports).
I have created firewall exceptions for TCP Port 1433, UDP Port 1434, and program exceptions for sqlservr.exe and sqlbrowser.exe.
If someone could tell me which of the four versions of the DataSource part of the connection string I should be using it would be a great help, even if it did not solve the problem. It would mean that everything I try subsequently I would only have to test once instead of four times.
Thanks in advance for any help!
Where did you enter the firewall exceptions, on your machine, on the server, or both?
The second connection string is the only really valid one. Can you telnet to the server on port 1433? Can you connect to the instance from Management Studio remotely and the problem is only from your code where the connection string is? Did you try running the same code on the server? Did you try forcing TCP/IP (vs. named pipes/shared memory etc) adding the following parameter to your connection string:
Network=DBMSSOCN;
This question comes up quite a lot and I'm sure you're hitting something that others have hit before. Have you gone through this article, "How to troubleshoot connecting to the SQL Server Database Engine"? Also there are 20+ questions on here that mention this error message and Express, according to this search result. I suggest double-checking your settings against some of the items in those answers that solved the issue for other users.
I have been unable to configure my SQL Server 2008 Express to allow remote connections. I followed the instructions from this guide: http://www.linglom.com/2009/03/28/enable-remote-connection-on-sql-server-2008-express/ .
I am still getting the following error:
Cannot connect to 00.00.00.000
Additional information:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
(Provider: Named Pipes Provider, error 40 - Could not open a connection to SQL Server) ( Microsoft SQL Server, Error: 3)
I also configured the firewall as defined in http://blog.sqlauthority.com/2009/05/21/sql-server-fix-error-provider-named-pipes-provider-error-40-could-not-open-a-connection-to-sql-server-microsoft-sql-server-error/ . As a test I even turned off the firewall, but nothing changed, so it is not the issue.
Update under server name, it only says the IP address. Do I need something more?
In the Server name field of Connect to Server, I had myipaddress. I changed it to myipaddress\SQLEXPRESS and it works.
In addition, once this was working without the firewall I applied settings as defined in http://www.sevenforums.com/system-security/58817-remote-access-sql-server-express-2008-windows-7-a.html to make the connection work with the firewall turned on.
Do you have sysadmin rights in sql express? It may be that your user account doesn't have the necessary permissions. There is a script on codeplex that will add you logged on account as a sysadmin.