SQL Server Service Is Not Starting - Reasons and Fixes

Here is the common error which you would receive when we try to start SQL Services from various places.  

Windows could not start the SQL Server (MSSQLSERVER) on Local Computer. For more information, review the System Event Log.  
OR  
“The service failed to respond in a timely fashion”.  
OR  
“The service failed to start”.  

We will try to investigate each of these reasons messages and possible resolution for the same. 

Reason # 1: Service account password changed but not updated on the server where SQLServer instance is installed 

This is one of the most common cause where service account password has been changed by domain admin or SQL Admin but this information is not updated in SQL Server Services.  

Here is the error which we would see if we try to start using Services.  

--------------------------- 
Services 
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Windows could not start the SQL Server (MSSQLSERVER) service on Local Computer.Error 1069: The service did not start due to a logon failure.--------------------------- 
OK    
---------------------------  

 

 

System Event logs should show below 

 
Log Name:      System 

Source:        Service Control Manager 

Date:          <Date Time> 

Event ID:      7000 

Task Category: None 

Level:         Error 

Keywords:      Classic 

User:          N/A 

Computer:      MyServer 

Description: The SQL Server (MSSQLSERVER) service failed to start due to the following error:  

The service did not start due to a logon failure. 

 

Solution: We need to update the password in services. The right way to do it is to use SQL Server Configuration Manager and type in new password (under Log On tab)  

That was easy to say the least.  



Reason # 2: Startup parameters have incorrect file path locations. 

 

This is another common cause of SQL Server Service startup failure. Let’s assume that master database is located on a drive and files of the database (master.mdf and/or mastlog.ldf) are not available. Since master database is a system database, SQL Service would fail to start.  

 

 

--------------------------- 

Services 

--------------------------- 

Windows could not start the SQL Server (MSSQLSERVER) on Local Computer. For more information, review the System Event Log. If this is a non-Microsoft service, contact the service vendor, and refer to service-specific error code 17113. 

--------------------------- 

OK    

--------------------------- 

 
If we attempt the same via configuration manager, we get standard error which doesn’t explain much.  

Whenever we get such errors, we should start looking at SQL Server ERRORLOGs are defined under start-up parameters or application event log.  

 

 

We can open ERRORLOG using notepad or any other text editor.  Here is the snippet which shows the problem. 

<Date Time> Server      Error: 17113, Severity: 16, State: 1. 

<Date Time> Server      Error 2(The system cannot find the file specified.) occurred while opening file 'C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\master.mdf' to obtain configuration information at startup. An invalid startup option might have caused the error. Verify your startup options, and correct or remove them if necessary. 

 
As highlighted above, we can see that SQL is not able to find the file master.mdf. 

 
Below is another example of error for model database.  

<Date Time> spid9s Error: 17207, Severity: 16, State: 1. 
<Date Time> spid9s FileMgr::StartLogFiles: Operating system error 2(The system cannot find the file specified.)occurred while creating or opening file 'C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\modellog.ldf'. Diagnose and correct the operating system error, and retry the operation. 
<Date Time> spid9s File activation failure. The physical file name "C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\modellog.ldf" may be incorrect. 
<Date Time> spid9s Error: 945, Severity: 14, State: 2. 
<Date Time> spid9s Database 'model' cannot be opened due to inaccessible files or insufficient memory or disk space. See the SQL Server errorlog for details. 
<Date Time> spid9s Could not create tempdb. You may not have enough disk space available. Free additional disk space by deleting other files on the tempdb drive and then restart SQL Server. Check for additional errors in the event log that may indicate why the tempdb files could not be initialized. 

SolutionFirst we need to find out the correct location of the files. Once files are identified, either put them into the location where SQL Server wants or ALTER the database to point to correct location. If there is an issue with model or tempdb database then we need to start SQL Server using trace flag 3608 as explained in http://msdn.microsoft.com/en-us/library/ms345408.aspx  



Reason # 
3System database files not available - accidental deletion or corruption due to disk failures. 
 

If files are missing or corrupted for system databases (master and/or model) SQL Server service would not start. ERRORLOG (mentioned earlierwould contain the exact database name and file name which has the problem. Here are few snippets of error pointing to corruption of system databases.  

<Date Time> spid5s Starting up database 'master'.  

<Date Time spid5s Error: 9003, Severity: 20, State: 1. 

<Date Time spid5s The log scan number (216:72:1) passed to log scan in database 'master' is not valid. This error may indicate data corruption or that the log file (.ldf) does not match the data file (.mdf). If this error occurred during replication, re-create the publication. Otherwise, restore from backup if the problem results in a failure during startup.  

<Date Time> spid5s Cannot recover the master database. SQL Server is unable to run. Restore master from a full backup, repair it, or rebuild it. For more information about how to rebuild the master database, see SQL Server Books Online. 
 

Depending on which database file is corrupted, we need to take appropriate action. If master database files are corrupted (error above)then we need to rebuild the master database and restore it from the backup. If issue exists with other system databases then SQL can be started via trace flag and they can be restored. Books online has topic for each database. Refer http://msdn.microsoft.com/en-us/library/ms190190.aspx 

There can be many other reasons to service not starting which we will cover in a separate KB article in the future.  

 

 

 

 
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