4089
MySQLERRORCommonHIGH confidence
InnoDB cannot open data file
Production Risk
High — The affected tablespace is inaccessible until the file issue is resolved.
Why it happens
- 1The data file does not exist at the expected path.
- 2File permissions prevent the MySQL process from opening the file.
- 3The file path in the configuration does not match the actual file location.
Fix 1
Verify the data file path and permissions
Why this works
Check innodb_data_file_path and confirm files exist with correct ownership.
Fix 2
Restore the missing data file from backup
Why this works
If the file is lost, restore from the most recent backup.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 4089 ER_INNODB_CANNOT_OPEN_DATAFILE
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