MySQL 1165: Error reading from file.

What is MySQL 1165: Error reading from file.

Verify the MySQL error log for any additional error messages that can provide more context. You can find the error log location by running:

SHOW VARIABLES LIKE 'log_error';

Check the file and directory permissions of the file mentioned in the error to ensure MySQL has read access. Use the command:

ls -l /path/to/problematic/file

Confirm there is enough disk space on the drive where the MySQL data directory and the problematic file are located:

df -h

Ensure the file mentioned in the error actually exists at the specified path. If not, you may need to restore it from a backup.

If running in a replication setup, and the error relates to reading a binary log or relay log file, consider showing binary/relay log status:

SHOW BINARY LOGS;SHOW RELAYLOG EVENTS;

If the error persists and is related to a specific table, attempt to verify and repair the table using:

CHECK TABLE yourtablename;REPAIR TABLE yourtablename;

Restart the MySQL service to clear any temporary file-related issues that might have arisen during runtime:

sudo systemctl restart mysql8. If the problem is related to not being able to read a file required for a MySQL upgrade or system table, consult the specific MySQL version upgrade documentation for troubleshooting steps related to your version.