Topics from the Microsoft SQL Server Protocols team - Netlibs, TDS, SQL Browser, etc.
In continuing with the theme of understanding error messages I'll discuss the "login failed" messages that are surfaced by the client and written to the server's error log (if the auditlevel is set to log failures on login which is the default) in the event of an error during the login process.
If the server encounters an error that prevents a login from succeeding, the client will display the following error mesage.
Msg 18456, Level 14, State 1, Server <server name>, Line 1Login failed for user '<user name>'
Note that the message is kept fairly nondescript to prevent information disclosure to unauthenticated clients. In particular, the 'State' will always be shown to be '1' regardless of the nature of the problem. To determine the true reason for the failure, the administrator can look in the server's error log where a corresponding entry will be written. An example of an entry is:
2006-02-27 00:02:00.34 Logon Error: 18456, Severity: 14, State: 8.
2006-02-27 00:02:00.34 Logon Login failed for user '<user name>'. [CLIENT: <ip address>]
2 and 5
Attempt to use a Windows login name with SQL Authentication
Login disabled and password mismatch
11 and 12
Valid login but server access failure
SQL Server service paused
Change password required
Disclaimer: This posting is provided "AS IS" with no warranties, and confers no rights
Hello if u face Microsoft SQL server, Error:18456
Then open management studio as administrator.
I hope that this works as it did for me.
The post is really helping me in undertstanding the error happening in our Production SQL Server 2005.
Below are the Error Message Details :
Source : Logon
Message : Login failed for user 'NT AUTHORITY\SYSTEM'. [CLIENT: <local machine>]
Date : 6/14/2010 8:03:19 AM
Log : SQL Server (Current - 6/16/2010 2:02:00 AM)
Source : Logon
Message : Error: 18456, Severity: 14, State: 16.
I am getting this error every minute logged in the SQL Server Error Log.
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I have the same error with state 16 and the user NT Authority\System on the local SQL server.
The database where user tries to log on is marked as suspect by some restore.
- What is the error, what is the consequenz? suspect db causes login error or login error causes suspect db??
- What can I do to get things straight again?
I am getting
Error Number: 18456
Line Number: 65536
could someone help me how to
deal with this problem?
I am running SQL Server 2008
I can log on using windows authentication but
having this problem when using sql server authentication
thanks for the response!!!
I am trying to sign up for www.Caring4Cancer.com--i keep getting login failed
I met this error:Error:
18456, Severity: 14, State: 16.
Login failed for user 'NT AUTHORITY\SYSTEM'.
At last i found that the reason for this error When a replication-job run, after carefully checked,i found that i dropped publication and subscriber database , and i forgot to delete theses replication jobs.
So when theses jobs run, SQL can't log NT AUTHORITY\SYSTEM in to my dropped publication and subscriber database
Im having this problem with sql server 2005 in the first example of c#:
Error: 18456, Severity: 14, State: 16.
A little trick I found after I was getting Login errors using management studio on the localhosst (win2008R2)
You need to "run as adminstrator"
What about the same error but for:
- windows authentication
- user which has sysadmin role
- connection is local
- state is 1 ?
the error state... INvalid attempt to read when no data is found... how could I be able to resolve it???????
I really need your response... thank you... email me at email@example.com
Just change the server authentication mode to "SQL Server and Windows Authentication mode" in Server Properties -> Security Tab.
Sure It will be working fine.
Tank you. You have help yet another.
Thank you. You have help yet another.