I have a service that talks to local instance of SQL Server. I am getting an error
System.Data.SqlClient.SqlException:
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)
This error happens intermittently. Since this is part of my continuous integration process its painful as I have to carry out whole build process again.
I would like to make this clear that I am not getting the issue every time its random in nature.
Please help me with this.
Have you tried toggling the various connection interfaces via the SQL Server Confoguration tool? I suspect you may be connecting via TCP/IP, which could be the subject of network issues elsewhere. Because you're local to the server, you could disable that interface and force the use of Shared Memory, which should help you troubleshoot the problem.
For more information on the connection types, see http://msdn.microsoft.com/en-us/library/ms187892.aspx
Related
I cannot connect to any remote SQL Server instances from my system. I used to connect them from SQL Server Management Studio. Moreover, I can still connect to the same SQL Servers remotely from another systems (my colleagues' system).
I am getting 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider)
Error Number: 53
Severity: 20
State: 0
I have checked:
Named pipes/TCP is enabled.
Remote connections are allowed.
Windows Firewall is off.
Enabled everything in SQL Server Configuration Manager.
Also, I have tried everything mentioned in this post-
How do I fix the error 'Named Pipes Provider, error 40 - Could not open a connection to' SQL Server'?
But still could not solve my problem. Please suggest any method which allows me to fix this error and connect to the remote servers again.
instead of check whether that server system is working or not, because sometimes if the server system is not working means we are unable to connect to that system
I have tried EVERY suggestion I have found so far in SE and nothing works. Let me explain what is going on.
I am a PHP developer and I am making a transition to ASP. So I am developing a website locally and I need a database going, also locally. But like I said, I can't add the NORTHWND database because I don't have the server up and running. I read through the tutorials and I seen to be missing a piece of every puzzle.
I have SQL Server 2008 running.
These guys Add Database say to attach the database via VS12. I have no such option to "Attach"
These guys here Connect to your server say to connect to the SQL server but I can't connect. When I try, I get an error that says:
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)
(.Net SqlClient Data Provider)
I also noticed there was a localdb with username LOTUSMS. I don't remember ever making a username for anything here. And I can't remove it or make one up. (Windows Authentication)
And then these guys Turn on your Server Service say the Server must be up and running and to log into the SQL server Configuration Manager and ensure the SQL services are running. Well, they are not. It says "the remote procedure call failed" and there is no other options to restart or edit or anything
So as you can see, I know my problems, but I can't find the solution to them. Anyone? I am not sure as to what logs or extra evidence you may need, so before I go adding unnecessary text and pics here, I'll leave it open and produce the evidence as requested.
Thanks in advance
I tried to login to a remote server and I saw the error given at the link -
http://www.microsoft.com/products/ee/transform.aspx?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=2
Message says -
Message: An error has occurred while establishing a connection to the server. When connecting to SQL Server, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider)
Which is followed by -
Explanation
SQL Server did not respond to the client request because the server is probably not started.
Arent the message and explanation contradicting each other ? Which one is the correct reason for the problem ? How do i find out the REAL source of the problem ?
They don't contradict each other. They just give different possible reasons:
SQL Server doesn't allow remote connections
SQL Server is not started
To fix it, make sure that SQL Server allows remote connections and is started.
Allowing remote connections can be done in the "SQL Server Configuration Manager":
Start that program on the server on which SQL server is installed.
Navigate to "SQL Server Network Configuration" -> "Protocols for "
Double click on the connection type - e.g. Named Pipes - and set "Enabled" to "Yes".
If you are enabling TCP/IP, make sure to also enable each individual IP address on the second tab.
See this blog post for more info.
Thee program you are using is unable to find SQL server on the port/address it expects to.
This is likely either because it is misconfigured, or because SQL server is stopped.
I suggest you open a desktop login to the machine in question, and see if SQL server is running.
There are other potential causes for this problem, as well: network problems, for example.
Am seeing an intermittent issue with a production SQL box, with errors returning:
System.Data.SqlClient.SqlException: 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)
Running perfmon shows me that there are a maximum of 15 user connections open - on many occassions we open much more than this in the past. So i think this rules out connections that are left open.
Furthermore this is a production application that has not undergone changes over the past couple of months, and has always run perfectly well.
I am thinking maybe DNS issues, or siwtch issues possibly, as the web and SQL boxes are running on the same network, without firewalls in between.
Can anybody else shed any light.
One another note - the reference to "provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server" - i assume this denotes a connection via named pipes. I actually disabled named pipes earlier in an attempt to force TCP?
So the situation is that I've d/l nopCommerce and a slew of other web development programs in order to save some cash on my business.
I've created a local server/database with sql anywhere 12, and then run nopCommerce with VS2010 to begin the install, but receive this error message when attempting to connect with the server:
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)
I've also ran the same db in VS and tried running it that way, while nopCommerce asks for a server name, I've tried many to no avail.
Checked spelling, I'm running everything local, so none of this makes sense.
All help is appreciated.
Have you enabled Named Pipes protocol for your SQL server?