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Description

This error indicates that MySQL is unable to write to its binary log files, which are crucial for replication, point-in-time recovery, and auditing. It typically occurs when MySQL attempts to record a data-modifying statement but encounters an issue with the underlying file system, permissions, or server configuration.

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Error Message

Binary logging not possible. Message: %s

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Known Causes

4 known causes

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Insufficient Disk Space

The server's disk where binary logs are stored is full or has reached its capacity, preventing MySQL from writing new log entries.

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File System Permissions

The MySQL user lacks the necessary write permissions for the directory where binary log files are configured to be stored.

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Invalid Configuration

Incorrect or missing `log_bin` or `log_bin_index` settings in the MySQL configuration file (`my.cnf` or `my.ini`) can prevent binary logging from initializing or continuing.

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Corrupted Binary Log Files

Existing binary log files or the binary log index file (`.index`) might be corrupted, making it impossible for MySQL to append new entries.

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Solutions

4 solutions available

1. Verify Binary Log File Permissions easy

Ensure the MySQL user has write permissions to the directory where binary logs are stored.

1

Identify the directory where binary logs are configured to be stored. This is typically specified by the `log_bin` variable in your MySQL configuration file (`my.cnf` or `my.ini`). If `log_bin` is set to a filename without a path, it defaults to the data directory.

SHOW VARIABLES LIKE 'log_bin_base_dir';

2

Check the ownership and permissions of this directory. The MySQL server process (usually running as user 'mysql') needs write access.

ls -ld /path/to/your/log_directory

3

If permissions are incorrect, grant write access to the MySQL user. Replace `/path/to/your/log_directory` with the actual path.

sudo chown -R mysql:mysql /path/to/your/log_directory
sudo chmod -R 755 /path/to/your/log_directory

4

Restart the MySQL server to apply the permission changes.

sudo systemctl restart mysql

2. Enable Binary Logging in Configuration medium

Ensure binary logging is explicitly enabled and configured correctly in the MySQL server's configuration file.

1

Locate your MySQL configuration file. This is typically `my.cnf` on Linux/macOS or `my.ini` on Windows. Common locations include `/etc/mysql/my.cnf`, `/etc/my.cnf`, or within the MySQL installation directory.

text: (e.g., /etc/mysql/my.cnf)

2

Edit the configuration file and ensure the following lines are present and uncommented in the `[mysqld]` section. If `log_bin` is set to a specific filename, ensure the directory for that file exists and is writable (see Solution 1).

[mysqld]
log_bin = mysql-bin
server_id = 1

3

If you are using replication, ensure `server_id` is unique for each server in the replication topology. If you are not using replication and just want general binary logging for point-in-time recovery, `server_id = 1` is usually sufficient.

text: (e.g., server_id = 2 for a replica)

4

Save the configuration file and restart the MySQL server.

sudo systemctl restart mysql

3. Check for Disk Space Issues easy

Insufficient disk space can prevent the creation of new binary log files.

1

Check the available disk space on the partition where your MySQL data directory and binary logs are stored. The error message '%s' might contain clues about the specific file that failed to be written.

df -h

2

If disk space is low, free up space by deleting old logs (if `log_bin_rotate_on_size` is not set, you might need to manually manage old binlogs) or other unnecessary files. If `log_bin_rotate_on_size` is set, ensure the system is rotating them as expected.

text: (e.g., sudo rm /var/lib/mysql/mysql-bin.000001)

3

Restart the MySQL server after freeing up space.

sudo systemctl restart mysql

4. Address File System Errors or Corruption advanced

Underlying file system issues or corruption can prevent binary log operations.

1

Examine the MySQL error log for any related file system errors or disk I/O issues. The error message '%s' might provide more specific details.

text: (Check MySQL error log, e.g., /var/log/mysql/error.log)

2

If file system errors are suspected, run file system check tools (e.g., `fsck` on Linux). This often requires unmounting the file system, which means the MySQL server will need to be stopped and potentially the entire server rebooted.

text: (e.g., sudo umount /path/to/mount_point; sudo fsck /dev/sdXn)

3

If the problem persists and is suspected to be disk-related, consider running disk diagnostics (e.g., `smartctl`).

text: (e.g., sudo smartctl -a /dev/sdX)

4

If file system corruption is severe, you might need to restore from a backup. Ensure you have a reliable backup strategy in place.

text: (Restore from backup)

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Related Errors

5 related errors

MySQL Error 1598: Binary Logging Failure