There was an error when communicating with the server. See the server log file, typically /var/log/cloudera-scm-server/cloudera-scm-server.log, for more information.
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We're attempting to deploy an existing SQL Server/SSRS configuration to a new set of hardware. SSRS is running on the same server as the SQL Server database we're trying to get reports from.
Whenever we attempt to test any of the reports, we receive the error:
An error has occurred during report processing. (rsProcessingAborted)
Cannot create a connection to data source 'sqlConnection'. (rsErrorOpeningConnection)
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
The Windows user has full rights to the server.
The logins all appear to exist.
TCP is running.
Named instances are fine.
SQL Browser Service is running
"sqlcmd -L" shows the database server listed
I'm at a complete loss.
Create a udl file, if it connects then the problem is the code / application, if it does not connect, then it's your firewall, connections string, dll library, service you are running IIS under not having the right permissions etc etc. Well the important thing here is probably the connection string. Do the following: create an empty text file and rename it "myconnection.udl". Now double click on the file and it will launch an applet. You can configuer the connection to your database and test it. (it will pick up registered connection libraries etc). If it gives OK, then open the udl file in notepad, you will see the correct connection string. Paste to your app connection settings. UDL files are generally misunderstood. They are simply a text file that holds the connection settings. They then call the connection dll. If the udl file works then you have a correct connection string 100%
We created a new report and deployed it and it just worked. After some investigation, the report that I had been asked to use as a test initially has a parameter that defaults to connect to a completely different SQL Server which the new environment cannot, and should not see. All the other reports are working.
My guess is that we actually corrected the problem early on when we modified the service credentials, but by then we had fallen into a loop of testing against what turned out to be a bugged report.
TLDR: There was a bug in the report we were testing against. We had already corrected the problem and didn't even realize it because, apparently, we're idiots.
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.
First off, I only have a very basic understanding of SQL. I can create tables etc. but configuration is beyond me. I am running my web site with MVC3 ASP.Net on a windows 2008 server using SQL Express.
Everything works fine, my connection strings are correct, I can use the website and it reads and writes to the dB, I can also view the dB with management studio on the server.
Today I got 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: SQL
Network Interfaces, error: 26 - Error Locating Server/Instance
Specified)
When I tried to log on to the database in management studio on the server I get a similar error. the only fix I have found is for a server restart. The database was down for 6 hours before I noticed which is not good for a start up website.
Has any one seen this issue before? Is this an express issue? Any help or advice would be great.
Troubleshoot as you would any network error. Start with the server's event logs.
As for notification of downtime, there are a lot of web services that will monitor your web site and email or send you an SMS message if it's not responding. Two that I've used are uptimerobot.com and basicstate.com. There are dozens of others.
You could also rewrite your ASP.Net app to email or text you when certain kinds of errors happen.
Up until last night, my site (hosted by DiscountASP.net) and the SQL Azure database that it connects to were running normally.
For some reason, during the night, the site went down with a named pipe error. Error 40.
Having prefixed the server name with "tcp:" in the connection string, the error is now:
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.)
So, just to be clear, the web.config file did not change at all between the time the website last worked and the item the named pipe error came up.
Now, the username, password and instance name are all correct since the site runs locally against the remote SQl Azure server perfectly.
I've checked the instance name and the SQl Azure access rules, ensuring that the web server's IP address is whitelisted.
Any ideas on whats wrong?
If I understand this right, your local website (on-premise) can connect to SQL Azure, but your website deployed in Azure can't?
Make sure your firewall rules has the "allow other windows azure services to access this server". Checking this option off basically prevents any azure-hosted application/service from connecting to your database.
I have a problem,I run application C# and I get a 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: SQL Network
Interfaces, error: 26 - Error Locating
Server/Instance Specified)
???
what?
thanks
The error message pretty much says it all: make sure the instance name is correct (if your SQL server is using instances) and make sure your server is configured to allow remote connections.
How to configure SQL Server to allow remote connections
How to connect to a server instance
Tip for troubleshooting your connection string:
Create a file named "testconnect.udl".
Double click the newly created file.
On the "Data Link Properties" dialog Switch to first tab "Provider".
From the list of providers select "SQL Native Client".
Click "Next>>".
Complete the following information according to your desired connection:
Data Source // your server name
User Name + Password; check "Allow saving passwords"
Initial catalog // your database name
Click "Test connection".
If the connection succeeds save the database link, clicking "OK".
Open the testconnect.udl file with a text editor of your choice and compare the information with your application connection string.
Check the protocols that are enabled for your server.
Run the Configuration Manager; you may need to enable TCP/IP.