Database Error 18456
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Related Tips: More > Error Logs Problem SQL Server Error Logs often show a message related to error 18456. Although it generally means a login attempt from a client connection has failed, different State numbers associated with error 18456 state 1 the error can mean different reasons for the failure. One of the error States is error 18456 sql server 2008 38, which was added with SQL Server 2008, means the database being accessed cannot be found or does not exist. Unfortunately the error 18456 state 5 Error Log entry does not show what database it is, so in this tip we walk through how you can determine which database is causing the error message. Solution A few days ago I was looking microsoft sql server error 18456 through the Error Log of a database server and noticed a large number of the same error messages that looked like the following: 2011-12-15 11:22:08.76 Logon Error: 18456, Severity: 14, State: 38. 2011-12-15 11:22:08.76 Logon Login failed for user '
Sqlstate 28000 Error 18456
associated with it, each having a different meaning for the failure. As I found out later, States 38 and 40 (in SQL 2008 and later) and States 16 and 27 (before version 2008) mean that there is an issue with the database being connected to. The database could be offline, shutdown, deleted, dropped, renamed, auto-closed, or inaccessible for some other reason. It could also be the default database for the login where explicit permission was not given. The server was running an instance of SQL Server 2008 and although it was a test instance, I decided to spend some time to find out what database was being accessed by this account. The reason I wanted to dig deeper was because the error was happening many times, almost every ten seconds, and in my view it had these potential problems: If this was a production server, SQL would be spending I/O time writing the same message to the Error Log. In other words, disk access would be almost continuous. The potentially large Error Log would take longer and longer to load. Even with this instance where the Error Log was cycled every night, it was still taking time to load thousands of rows of log entries. Things would be even worse for instances where the log was not cycl
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Error 18456 State 38
Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – error 18456 sql 2008 r2 Add SQL Administrator to SQL Management Studio How to Fix Login Failed for User (Microsoft SQL Server, error 18456 severity 14 state 8 Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio tagged GURU-Tip / How To / SQL Server / Step-By-Step In this post (and video), I will https://www.mssqltips.com/sqlservertip/2581/sql-server-error-18456-finding-the-missing-databases/ teach you how to determine what user has administrative rights on the server as well as walk you Step-By-Step how to configure SQL Server to allow other users to login as Administrators to SQL Server. The generic message “Login Failed for User (Microsoft SQL Server, Error: 18456)” means you entered invalid credentials when logging into SQL Server. http://itproguru.com/expert/2014/09/how-to-fix-login-failed-for-user-microsoft-sql-server-error-18456-step-by-step-add-sql-administrator-to-sql-management-studio/ Video is short but has additional tips and tricks so watch the video to get the FULL STORY! In the below screen shot, I am logging into Microsoft SQL Server Management Studio with a user that does not have administrative permissions to connect to the server. You need to figure out what user does have rights to SQL server. Usually this is the user that you logged in with when you installed SQL Server or the user that is the default administrator on the computer. To get a list of users on the machine (Assuming Windows Server 2012 or above) Step-By-Step Launch Server Manager – Start – Click Server Manager In the upper right corner, click Tools, then Computer Management Expand Local Users and Groups (Under Computer Management-System Tools) then click Users Notice under Description… There is a Built-in account for administering… This is very likely an account that has access to SQL server. Try logging onto windows with that account that is Built-in account for administering then we
Login-based server access validation https://confluence.atlassian.com/confkb/unable-to-connect-to-sql-server-due-to-error-18456-severity-14-state-12-325978134.html failed with an infrastructure error. Check for previous http://sqlblog.com/blogs/aaron_bertrand/archive/2011/01/14/sql-server-v-next-denali-additional-states-for-error-18456.aspx errors. [Client: 127.0.0.1] Error: 18456, Severity: 14, State: 12 The following appears in theatlassian-confluence.log: 2013-02-25 15:09:44,445 ERROR [http-8090-2] [atlassian.config.bootstrap.DefaultAtlassianBootstrapManager] getTestDatabaseConnection Could not successfully test your database: -- referer: http://
makers of performance monitoring and event management software for SQL Server, Analysis Services, and Windows. He has been blogging here at sqlblog.com since 2006, focusing on manageability, performance, and new features; has been a Microsoft MVP since 1997; tweets as @AaronBertrand; and speaks frequently at user group meetings and SQL Saturday events. Troubleshooting Error 18456 I think we've all dealt with error 18456, whether it be an application unable to access SQL Server, credentials changing over time, or a user who can't type a password correctly. The trick to troubleshooting this error number is that the error message returned to the client or application trying to connect is intentionally vague (the error message is similar for most errors, and the state is always 1). In a few cases, some additional information is included, but for the most part several of these conditions appear the same to the end user. In order to figure out what is really going wrong, you need to have alternative access to the SQL Server and inspect the log for the true state in the error message. I helped our support team just today solve a client's 18456 issues - once we tracked down the error log and saw that it was state 16, it was easy to determine that their login had been set up with a default database that had been detached long ago. In SQL Server 2012, there is a new feature called "contained databases" - I've blogged about it here and here. With this feature comes a new layer of security that may creep onto your radar if you use this functionality: contained user authentication failures. There are a variety of things that can go wrong here. If you connect with a contained user but forget to specify a database name, SQL Server will attempt to authorize you as a SQL login, and you will fail with state 5 (if there is no SQL login with that name) or state 8 (if there is also a SQL login with the same name and the password doesn't match). There is also a new state 65 which occurs if you have spe