Error
Error Code:
3989
MySQL Error 3989: Schema Read-Only Mode
Description
This error indicates that an attempt was made to perform a write operation (e.g., INSERT, UPDATE, DELETE, DDL) on a database schema that is currently configured in a read-only state. This prevents any modifications to the schema or its data, often due to server configuration or maintenance. The error specifies which schema is affected.
Error Message
Schema '%s' is in read only mode.
Known Causes
3 known causesGlobal Server Read-Only Mode
The entire MySQL server instance has the `read_only` or `super_read_only` system variable enabled, making all schemas read-only for non-SUPER users.
Filesystem Read-Only
The underlying filesystem or storage where the database schema's data files reside is mounted as read-only, preventing MySQL from writing to disk.
Replication Slave Configuration
The server is configured as a replication slave, and the `read_only` system variable is intentionally enabled to prevent accidental write operations on the slave.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service