How It Affects Your App
This error indicates that the application is attempting to set the GTID_PURGED variable to a value other than an empty set when the OWNED_GTIDS variable is not empty. This can cause the application to fail, as it is not allowed to set the GTID_PURGED variable when OWNED_GTIDS is not empty. This can lead to data inconsistency and data loss, as the application will not be able to properly replicate data between servers. It can also lead to application downtime, as the application will not be able to properly process requests.
How To Fix
1. Check the error log for the MySQL 1841 error:
$ tail -f /var/log/mysql/error.log
2. Check the MySQL configuration file for the max_allowed_packet setting:
$ grep max_allowed_packet /etc/mysql/my.cnf
3. Increase the max_allowed_packet setting to a higher value:
max_allowed_packet = 16M
4. Restart the MySQL server:
$ sudo service mysql restart
5. Check the error log again to make sure the MySQL 1841 error is gone:
$ tail -f /var/log/mysql/error.log
6. Use an automated database observability tool to monitor and fix the MySQL 1841 in question. Automated database observability tools can provide real-time insights into the performance and health of your database, allowing you to quickly identify and address any issues that may arise. They can also provide detailed metrics and logs that can help you diagnose and troubleshoot any issues that may arise.
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