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Applies to: 
SQL Server
Azure SQL Managed Instance
Details
| Attribute | Value |
|---|---|
| Product Name | SQL Server |
| Event ID | 1401 |
| Event Source | MSSQLSERVER |
| Component | SQLEngine |
| Symbolic Name | DBM_MASTERSTARTUP |
| Message Text | Startup of the database-mirroring master thread routine failed for the following reason: %ls. Correct the cause of this error, and restart the SQL Server service. |
Explanation
Startup of the mirroring control thread failed.
User Action
In the SQL Server error log, look for the associated error that preceded this message. Correct the cause of this error, and then restart the SQL Server service (MSSQLSERVER).