A connection was successfully established with the server, but then an error occurred during the login process.

A connection was successfully established with the server, but then an error occurred during the login process.

Share on Facebook0Share on Google+0Tweet about this on TwitterShare on LinkedIn0Share on Reddit0
When you try to connect to a SQL Server database from a client application, under certain circumstances, you might get the below error message:

A connection was successfully established with the server, but then an error occurred during the login process. (provider: Named Pipes Provider, error: 0 – No process is on the other end of the pipe.)

A connection was successfully established with the server, but then an error occurred during the login process

In order to -possibly- overcome this problem you can perform the below two checks:

[First Check]:
Ensure that the maximum number of concurrent connections is set to 0 (in SSMS right-click on instance –> connections –> maximum number of concurrent connections), which means unlimited.

[Second Check]:
Ensure that in your connection string, in the client application, along with the rest of the settings, the database name is correct:

string connString=”Server=[SERVER_NAME]; Database=[DATABASE_NAME]; User ID = [USER_NAME]; Password=[PASSWORD]”;

If you specify a database that does not exist, even though the connection to the SQL Server instance will be established, the provider will not be able to find the database thus resulting to the above error message.

Hope this helps!

The SQL Server and .NET Hub
Reference: The SQL Server and .NET Hub (http://www.sqlnethub.com)

What are your views on the subject? Have something to share? Feel free to leave your comment!


Recommended eBooks on SQL Server:

Developing with SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Developing SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Administering SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Administering SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Tuning SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Tuning SQL Server: eBook by SQL Server MVP Artemakis Artemiou
Artemakis Artemiou
Artemakis Artemiou is a Senior SQL Server Architect, Author, Software Developer and a Microsoft Data Platform MVP. He has over 15 years of experience in the IT industry in various roles. Among other, via his initiative SQLEBooks.com, Artemakis authors and publishes eBooks on different topics on SQL Server. Artemakis currently serves as the President of the Cyprus .NET User Group (CDNUG) and the International .NET Association Country Leader for Cyprus (INETA). Additionally he is the founder of the SQLArtBits initiative that aims to provide the technical community with simple, yet powerful and high-quality SQL Server tools. Currently, the highlights of these tools are DBA Security Advisor and In-Memory OLTP Simulator. Artemakis's official website can be found at aartemiou.com. Artemakis's blogs can be found at: SQLNetHub.com and TechHowTos.com.