MySQL Error 3845: Redo Log Archive Directory Clash

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Description

This error, ER_INNODB_REDO_LOG_ARCHIVE_DIR_CLASH, indicates a conflict in the file system configuration. It occurs when the `innodb_redo_log_archive_dir` parameter is set to a path that is either the same as, a subdirectory of, or a parent directory of the main MySQL server's data directory. MySQL prevents this setup to ensure data integrity and proper management of log files.

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Error Message

Redo log archive directory '%s' is in, under, or over server directory '%s' - '%s'

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Known Causes

3 known causes

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Incorrect Configuration Parameter

The `innodb_redo_log_archive_dir` setting in your MySQL configuration file (e.g., my.cnf or my.ini) is explicitly defined to an invalid location.

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Archive Path is a Subdirectory

The chosen directory for redo log archiving is located directly inside the MySQL server's main data directory, which is not permitted.

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Archive Path Overlaps Server Directory

The configured redo log archive directory is either identical to the MySQL server's data directory or is a parent directory containing it.

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Solutions

Coming Soon

Detailed 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

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Related Errors

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