A connection was successfully established with the server, but then an error occurred during the login process. (Error Number: 233)

a connection was successfully established with the server but then an error pre-login handshake
a connection was successfully established with the server the certificate chain was issued
sql server error 18456
microsoft sql server, error: 233
sql server error 223
login failed for user 'sa'
sql server authentication login failed
error 18456 sql server authentication

I am having error while connecting to SQL Server:

Details in Stack Trace are:

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Cannot connect to ServerName.

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A connection was successfully established with the server, but then an error occurred during the login process. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.) (.Net SqlClient Data Provider)

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For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=233&LinkId=20476

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Server Name: ServerName
Error Number: 233
Severity: 20
State: 0


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Program Location:

   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParserStateObject.ReadSniError(TdsParserStateObject stateObj, UInt32 error)
   at System.Data.SqlClient.TdsParserStateObject.ReadSni(DbAsyncResult asyncResult, TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParserStateObject.ReadNetworkPacket()
   at System.Data.SqlClient.TdsParserStateObject.ReadBuffer()
   at System.Data.SqlClient.TdsParserStateObject.ReadByte()
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK)
   at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject, Boolean withFailover)
   at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart)
   at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
   at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
   at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
   at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup)
   at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
   at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
   at System.Data.SqlClient.SqlConnection.Open()
   at Microsoft.SqlServer.Management.SqlStudio.Explorer.ObjectExplorerService.ValidateConnection(UIConnectionInfo ci, IServerType server)
   at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()

NOTE I have tried

  • closing, reopening Sql server Management Studio.

  • closing , reopen VS & rebuild Solution

  • killed worker process accessing database.

  • login credentials are correct.

  • able to ping server to make sure its not down.

How to Fix Microsoft SQL Server error 233 – Login failed, A connection was successfully established with the server, but then an error occurred during the login process. (provider: Shared Memory  The process could not connect to Subscriber 'panam'. 2016-01-08 06:04:44.975 Category:NULL Source: Microsoft SQL Native Client Number: 10054 Message: TCP Provider: An existing connection was forcibly closed by the remote host. 2016-01-08 06:04:44.991 Category:NULL Source: Microsoft SQL Native Client Number: 10054 Message: Client unable to

Turn out to be some SQL service was stopped somehow on server. Restarting SQL Server service manually was the solution.

I know this is foolish but worked anyway. Thanks @PareshJ for the useful comment.

SQL Server, local instance, No process is on the other end of the , A connection was successfully established with the server, but then an error occurred during the login process. (provider: Shared Memory Provider, error: 0 – No process is on the other end of the pipe.) (Microsoft SQL Server, Error 233) Sql Server Verion. Sometimes we need to find sql server version number, edition … Thanks for this post. Just had this problem after applying which failed as part of windows update. Security Update for SQL Server 2016 Service Pack 1 CU KB4505221

When you starting application 'Run as administrator'.This way I avoided this error.

MSSQLSERVER_233, A connection was successfully established with the server, but then an error occurred during the login process. Provider, error:0 - No process is on the other end of the pipe.) (Microsoft SQL Server, Error:233) We all know that SQL Server by default listens to the port number 1433. But, due to security reasons, the default  Teams. Q&A for Work. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

the following points work for me. Try:

  1. start SSMS as administrator
  2. make sure SQL services are running. Change startup type to 'Automatic'

  1. In SSMS, in service instance property table, enable below:

A Connection is successfully established with the server, (I'm quite impressed by the clarity of the Microsoft error message in this environment. in my case the number of user connections was reset to  The fixing method is to open "Microsoft SQL Server Management Studio" -> Right click the SQL server and then select "Properties" -> Security -> Change the authentication to mixed mode. -> Restart SQL server.

How to fix “Microsoft SQL Server Error 233- Login failed for user”?, A connection was successfully established with the server, but then an error occurred during the login process. (provider: Shared Memory Provider, error: 0 Error Number: 233. Severity: 20. State: 0 ------------------------------ (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.) (Microsoft SQL Server, Error: 233) I know, there are similar questions on this site, and the answer is, to enable TCP/IP and pipes.

A Connection is successfully established with the server. 6.3K views. 24. 4 SQL Fixes Duration: 2:37 Posted: 3 Mar 2017 Hi Leonardo, Please connect to SQL Azure via SQL Server Management Studio, and pay attention to the ‘maximum number of concurrent connections’ on Server Properties with ‘Connection’ tab. If the number is other than 0, then fill in 0 and restart the service.

A connection was successfully established with the server, but then an error occurred during the login process. in case SQL Server Instance has exceeded the total number of user connections set in server configurations. In my situation, I had a content filter/proxy called Covenant Eyes that was the likely cause. I tried repairing the install of SQL server 2012 and it crashed the install and still did not fix the problem.

with the server, but then an error occurred during the login process. to host and review code, manage projects, and build software together.

Comments
  • Possible duplicate of SQL Server 2008 Error 233
  • Check whether all your SQL Services are running. If yes, still restart all once and check again. Also, check whether MIxed authentication mode enabled for your SQL server.
  • I have enabled and started the browser service and the issue resolved. Please try.
  • My server is running in Mixed mode, I've stopped and started it and I'm still getting this error :-(. I'm getting this from SQL localdb specifically.
  • Worked on V17 as well.
  • This one is the most valid answer
  • Many thanks, it saved a lot of time. On first install of SSMS it is selected "Windows Authentication Mode" by default.
  • Beautiful solution. This saved me several hours going through the internet.
  • Correct me if I am wrong but if you cannot login Object Explorer will not show the instance of the server