I'm using SQL server 2008r2 on a windows 2003 server and connecting to it from a vista machine.
The database itself is part of an application that uses ODBC to connect and that connects perfectly 100% of the time.
But as I'm making some changes to the application and database I'm working through the management console. The first time I try and connect to the db in the morning it times out.
I have a work around for it that involves remote desktoping to the server and connecting to the db using the mamangement console on the same server. Once I have connected locally I can close the remote session and then I'll be able to connect to the server from the management console on my pc. This connection will stay open all day but if I close the management console for a while (10+ mins, I havent fully tested how long) it will timeout again.
This happens from other client pcs as well so I'm thinking that I need to change something on the server... does anyone have any pointers as to what settings could cause this login timeout? and what I can do to fix it as its becoming a serious annoyance!
It sounds like you need to enable TCP/IP protocol. You can do this via SSCM (SQL Server Configuration Manager).
I think I have got it figured out now. The solution that seems to work is linked to TCP/IP protocol, as the above poster mentions. I needed to go into the protocol and update the ports used from dynamic to fixed and put them on 1433 (why this isn't default I dont know, and I presume theres good reason for it!)
Answer found on the post below
https://serverfault.com/questions/179898/sql-server-timeout-on-first-attempt
Related
I have two computers connected to the same switch on the same network with the same subnet, and when I go to either 32 or 64-bit ODBC to create a System DSN and attempt to add a new DSN using the SQL Server Native Client 11.0, the Server list is empty on one but fully populated on the other. I have a local SQL Server on both computers.
The last two entries above are from the computer that is not working. So the SQL Server on the non-working machine has an available instance.
For the computer that is NOT showing any SQL Servers I have tried the following with no success:
Upgraded the OS from Windows 10 to Windows 11
Followed the directions from Microsoft to open ports TCP 1433 and UDP 1434
Made sure the option to hide my SQL server instance is not enabled
Reinstalled ODBC drivers
Checked permissions
Nothing is working. Even my other computer can see my SQL Server instance, but I can't. I can type the server instance manually and that works. But I am dying to figure this out! This makes no sense to me. Also, the computer that works takes almost no time to build the list. On the computer that it's not working, it sits there for a long time before coming back empty.
I thought this could be a permission issue with my account, but it works fine on my other computer using the same account. The only other thing I can think of is it might be a policy issue, but I'm not sure where to go or look for a policy that might affect it. These are both work computers on a domain and even support here can't figure it out.
Any help/direction is appreciated. Thanks!
On my family's main computer, my MS SQL Server login works fine, but on my laptop, I get an error when using the same login: https://i.stack.imgur.com/jpYSy.png
I've tried various solutions (enabling TCP/IP and Named Pipes, creating an inbound rule for TCP 1433 in firewall, making sure SQL Server Browser is running, etc.) but none of them have worked so far. I am able to log on my the local server on my laptop with no errors. to the If anyone could figure this out for me, I would really appreciate it.
(Keep in mind that I am relatively new to the server side of programming)
Based on the image you posted with your question, it appears that the login and/or password is incorrect. When you attempt to connect to the instance of SQL Server from your laptop, are you using the same SQL Server Login that you use on the "family computer"? It may be that at one time you saved the credentials on your laptop, and possibly the login and/or password has changed. Can you please verify the instance is the exact same, the login and the password are identical? Following that, you should either be able to connect, or will receive a different type of login error.
Are you trying to connect using the IP Address or the name of the server? If you are using the name of the server then try starting the SQL Server Browser service.
It appears that it cannot find that server, so just as a test turn the firewall off (momentarily) for the server and see if that is what is blocking you. If it is make sure that the firewall has a rule to allow the sqlserver.exe program to go through.
Thanks for the help, but it turns out that my antivirus was messing with my internet connection, and Firewall was blocking sqlserver.exe.
Yes folks, it's this one again.
"A connection was successfully established with the server, but then
an error occurred during the login process (provider: TCP Provider,
error: 0 - An existing connection was forcibly closed by the remote
host.)"
I'm sorry... I have Google'd this, I have read the other StackOverflow articles on this problem, and I have tried all kinds of suggestions, but nothing works.
Here's a few notes about what we're seeing.
This issue occurs occassionally in SQL Server Management Studio itself (doing any kind of database activity... getting a list of tables in a database, having a look at a Stored Procedure, etc)
It also happens in Visual Studio 2010 itself, when it is trying to get data from the servers (e.g. when creating a .dbml file, etc)
It also sometimes happens in our .Net (ASP, WPF, Silverlight) applications.
Our SQL Server 2005 & 2008 servers are all based on virtual machines in data centres around the world, and we see sometimes this error on each of them. But most of the time, they all work absolutely fine.
When the error does occur, we can just "retry" what caused the error, and then it'll work fine.
We think.. if we have an IIS Web Server in a data centre in a particular city, and it accesses a SQL Server in the same data centre, then we don't see the issue.
We think.. if we connect to the servers, and specify the UserID and Password to use, it causes this error much more frequently than if we just use Active Directory authentication.
Put all that together, and it sounds to me like some kind of network issue.
But can anyone suggest what to look for ?
This isn't a bug in our .Net applications, as even SQL Server Management Studio "trips up" with this error.
It's baffling us.
Just in case anyone else hits this issue, we finally found the solution.
Our company uses Riverbed software to compress data, when it's being passed between locations, and this was somehow causing some connections to get dropped.
Our IT gurus found a configuration setting which finally fixed this issue.
I believe there's a setting in there to turn off compressing results from SQL Server (or something like that). That fixed it for us.
It could be any number of network issues. ANYTHING that prevents the code from reaching the server even for the few miliseconds it takes to make one query.
it could also be the result of a failover. When we went from a single SQL Server to a clustered environment, we'd see this happen during a failover. In this case, it turned out to be our Connection Pooling. In essence, the SQL cluster has a controller and two servers behind it. A and B.
Say our web app is using server A just fine, Connection pooling creates a connection on both sides. The server is aware of it, and the web app is aware of it. Once the cluster fails over to the second server, the web app is aware of the connection but server B is not, so we get an error.
The point is, any possible cause of network issues imaginable may be the cause. DOS attacks on the server, man-in-the middle attacks intercepting and changing traffic. Someone trips on an ethernet cable and it's loose in the jack. You name it, if it can cause a connection issue, it could be the cause.
Your issue also sounds like one we had recently - we also have a virtual environment, wih software that moves VMs from one host to another as needed for load balancing. Every so often, we'd get bombarded with the same error. It turned out to be an issue with the NIC drivers on one of the hosts, so whenever a VM moved to that particular host, errors would occur.
It's really not a programming issue. It's an environment issue, and you need trained professionals with direct access to your environment to research and resolve this.
My problem was that I was inadvertently using a wireless network to connect to our network because the Ethernet cable was faulty. This after repairing SQL Server, running a Winsock reset as recommended elsewhere ...
I am experiencing the same issue and our app interfaces with a several Azure SQL DBs. I believe (same as you) I do not have a bug in the C# code to cause this issue. We've solved it by a simple for loop containing an extra attempts to try to connect to the Azure SQL again if the previous attempt fails and then run the query.
Most of the time everything runs fine but sometimes we can see the loop kicked-in and on the 2nd or 3rd time it executed properly without the below mentioned error. After that we see in the log file the error below for all the unsuccessful attempts:
A connection was successfully established with the server,
but then an error occurred during the login process. (provider: TCP
Provider, error: 0 - An existing connection was forcibly closed by the
remote host.)
Even though this is a less-then-pretty solution, it allowed us to run our app without interruptions. I know you've mentioned that trying to connect again (to introduce some connection-failure tolerance) solves the problem and unfortunately this is the only correct solution I found so far as well.
I should mention that we have tried many debugging strategies to figure this out. Right now it all points to the availability of the database we are trying to connect to i.e.: It happens if the number of allowed DB connections is exceeded. (or so it seems at this time)
Turn off your VPN
My Problem fixed by turn off VPN
It was happening in our code when we were opening the dbconnection for oracle and were passing DBtype as SQL in our database object.
in my case - the error was Microsoft first suggestion:
Client is connecting with an unsupported version of the SQL Server Native Client.
In our case, We got this error when we updated sql server to sp3. We were not able to connect to the database from SSIS package.
We updated the native client and configurations. We were able to connect.
link to download the native client - https://www.microsoft.com/en-us/download/confirmation.aspx?id=50402
Link for configurations settings and further troubleshooting - https://learn.microsoft.com/en-us/previous-versions/sql/sql-server-2008-r2/ms187005(v=sql.105)
Hope it helps.
Cheers!
Had the same type of issue. In my case it was a bit more complicated... I could connect to “ServerA” from “ServerB” via SSMS, but it would fail with sqlcmd. The error was the same:
Sqlcmd: Error: Microsoft SQL Server Native Client 11.0 : TCP Provider: An existing connection was forcibly closed by the remote host.
I could also connect from “ServerC” with both SSMS and sqlcmd. The following are the versions on the VMs:
ServerA: Microsoft Windows Server 2012 R2 Datacenter / Microsoft SQL Server 2012 (SP3-CU10) (KB4025925) - 11.0.6607.3 (X64)
ServerB: Microsoft Windows Server 2012 R2 Datacenter / Microsoft SQL Server 2012 - 11.0.5058.0 (X64)
ServerC: Microsoft Windows Server 2012 R2 Datacenter / Microsoft SQL Server 2012 (SP3-CU10) (KB4025925) - 11.0.6607.3 (X64)
Bottom line was the “unsupported version”. I noticed a mismatch of “sqlncli11.dll” between ServerC and ServerB, so I copied it to the System32 folder. After this, sqlcmd worked like a charm. Below were the versions in my case:
Failed:
FileVersion: 2011.0110.5058.00
ProductVersion: 11.0.5058.0
Worked:
FileVersion: 2011.0110.6607.03
ProductVersion: 11.0.6607.3
I was working on 2 projects at the same time (on 2 different machines) and both used SQL Server.
When i disconnected SQL with 1 machine the errorMessage went away. Probably you can mess around with IP-adresses too to fix the problem.
In my case I was seeing this error intermittently from a .Net application connecting to a SQL server located in the same server room. It turned out that some of the databases had auto close turned on which caused the server to close the connections in the pool. When the application tried to use one of the pool connections that had been closed, it would throw this error and I saw a log message on the SQL server that the database it was trying to connect to was being started. Auto-close has now been turned off on those databases and the error hasn't been seen since.
Also, having auto-close on is the default behavior for SQL Express databases and these were originally created on an Express instance during testing before being migrated to the production server where we were seeing the errors.
this answer is for those how have this problem with Azure Sql server database.
It happens when you reach mat pool
first remove Persist Security Info=False from connection string
second check your database plan in azure portal and increase the PTUs of your database plan.
In SSMS "Connect to Server" screen click Options, then on "Connection Properties" TAB change "Network protocol" to "Named Pipes"
Try this -
Click Start, point to All Programs, and click SQL Server Configuration Manager.
Click to expand SQL Server Network Configuration and then click Client Protocols.
Right-click the TCP/IP protocol and then click Enable.
Right-click the Named Pipes protocol and then click Enable.
Restart the SQL server service if prompted to do so.
I have had this issue a couple of time already, and I've fixed by reducing the MTU size. Often 1350, 1250, etc on my network interface.
I just setup a new Windows Server 2008 machine with an instance of SQL Server 2008 Express. The SQL Browser service does not appear to be working correctly. In Management Studio, browsing for servers shows the hostname of the new server, but not the instance name. When you choose the hostname form the list it doesn't connect. But I can connect manually by typing the hostname\instancename combination.
update 1:
The browser service is running, and I have tried it with several different accounts, including domain administrator which is a bad practice, but I tried anyway for troubleshooting purposes.
I have tried punching the appropriate holes in the firewall, and also completely turning the firewall off.
This is running on a Hyper-V, Windows Server 2008 32 bit guest, which is on a Windows Server 2008 64-bit host. I have done this before (without issues) on this same host, but with SQL 2008 Standard instead of Express.
When I browse for the server in SSMS(Express) on the SQL Server machine, it works fine and shows the whole instance name. When I browse for it on a remote machine (on the same intranet) with SSMS (standard) it just shows the host name.
update 2:
Followed the packets as suggested and found the following
The client sent the broadcast as expected and received correct responses from other SQL Servers on the same network.
The server received the broadcast but did not send a response.
Considering these results, I wonder why the host name ever appears in the client list in the first place. It shouldn't show up at all, right?
update 3:
Spent an hour and a half on the phone with Microsoft support. I learned a few things, but the problem is not yet solved. It was suggested that I try installing an instance of SQL Standard on the same machine. I did that and the new instance exhibits all the same symptoms. The hostname shows up in the browse list only once, not once for each instance.
update 4:
Stackoverflow chose an answer for me thanks to the bounty system, but this question is not answered. Today I tried moving the whole VM to a different host server - everything is exactly the same. The hostname still appears in the browse list, without the instance name.
update 5:
Confirmed that Hyper-V Integration Services are installed on the guest (SQL) server.
check that the browser service is running, it's not turned on by default.
UPDATE1: See if you can install Network Monitor/Wireshark to do a network trace on the SQL Server to see if it's receiving the broadcasts and sending responses. I think this is your best option in troubleshooting this issue. According to MSDN the service uses UDP port 1434, so this is the traffic to watch.
UPDATE2: Does the server have multiple IP's? according to this MSDN article the Windows Server 2008 firewall has issues responding to SQL Browser service broadcasts, even with rules allowing packets through.
I tend not to rely on browsing. You'll get inconsistent results because browsing sends out a broadcast udp/1434 packet and waits for responses back. However, since you are able to connect remotely via SERVERNAME\INSTANCENAME, that aspect of the SQL Browser service is working. If it wasn't, you wouldn't have been able to connect. With that said, to troubleshoot the browsing portion:
Have you tried stopping and restarting the SQL Browser Service?
Have you tried stopping and restarting the instance if that didn't work?
To completely troubleshoot this, unfortunately, you'd have to do packet traces.
Sounds like the browsing service is messed up somehow...
I don't know if you can temporarily take this SQL Server down temporarily. But if so, you may want to try this:
Uninstall all SQL\instances completely.
Run the install of SQL Express 2008
Create a default instance during install (Not a named instance)
Run the installer again and create the default named instance (SQLExpress)
Try connecting to the named instance again. If it works, you can remove the default instance.
I had the same issue in a VM. After shutting down the Firewall it worked.
I just had this same issue. I was not able to see Instance Names in the SSMS Network Servers tab. It turned out that I had set up Hyper-V and created an Internal Network on my local machine. That network was identified as a Public/Guest Network and the Windows Firewall was ENABLED for it, even though my Domain setting has the Firewall DISABLED. Once I disabled that guest network on my computer I could see all the instances.
Machines:
Physical SQL Server 2014 Ent
Windows 8.1 laptop running Hyper-V
I have a desktop, and a Laptop. The Desktop has Windows 7 64-bit and the Laptop has Vista Ultimate 32-bit. On both machines I have SQL Server 2008 Standard installed.
On the laptop, I open SQL Management Studio and try to connect to the SQL Server on the desktop. It times out.
With SQL Server Config Manager I Enabled TCP/IP and Named Pipes for the client protocols.
In SQL Management Studio, I right clicked on the Database Engine, went to properties, and allowed remote connections. I also created a sql server login named "testuser" and a password. I then added that user as a login for my database and made them the database owner.
I could not figure out how to allow connection to my db throw the windows firewall, so I turned it off.
What am I missing? I made the same changes on my laptop, and I can connect from the Desktop to the Laptop in Management Studio?
Do you have a checklist?
Thanks.
UPDATE:
I turned off antivirus. Ran NetStat -a and the listener is listening.
If your login attempt takes about 30 seconds to timeout, then it's some kind of network connectivity problem (or SQL isn't listening properly). A permissions problem would come back after a few seconds, so the long wait says it's connection-related.
If you run "NETSTAT -a" on the server, so you see SQL Server listening on port 1433? If not, then maybe the SQL TCP Listener isn't configured properly on the server - there should be events in the Windows Event log to this effect when the SQL Service starts up.
Please edit your question with the results and we can go from there.
Try using Telnet to see if the laptop can see the desktop via port 1433.
Open a command prompt on the laptop and enter:
telnet DesktopNameOrIPAddress 1433
Press Enter, and you should either see a connection failed error, or a blank screen. If you get the blank screen, the connection was established. Press CTRL-] to break out of it, then type "quit" and enter to quit.
If the connection failed, attempt to resolve the general network issue with port 1433 before bothering to use the SQL Server tools.
If you have any other anti-virus software running, it may also have a firewall built in. I know that McAfee does, for instance. Check for that.
You've probably already thought of this, but have you checked that the server is configured to allow Mixed Mode Authentication? I have not had access to 2008, but I seem to remember that at least one of the previous versions was configured to disallow sql logins by default.
I assume you already did what you have to do on the OS level. Or maybe tried to link the server to see if you can actually traverse your network. Let me suggest a quick test. Check if you can actually test connectivity by creating a Universal Data Link. In case you don't know how to do this, create a new text file in your desktop (or anywhere) and change the .txt file extension to .udl; then just open it. See if your other server is "viewable" over the network (Don't forget to change the Provider to OLE DB Provider for SQL Server).
Is the SQL Browser Service running on the server you are trying to access? (By default this is disabled, and you'll need that to access SQL Server remotely)