MySQL 1842

This error indicates that the GTID purged value was changed, which can cause replication issues. It is a warning from MySQL that the user should check the master and slave for any discrepancies.

How It Affects Your App

MySQL 1842 ER_GTID_PURGED_WAS_CHANGED indicates that the GTID purged value has been changed. This can have a significant impact on an application as it can cause replication issues, data inconsistency, and other errors. It is important to ensure that the GTID purged value is consistent across all servers in the replication setup to avoid any issues. Additionally, it is important to monitor the GTID purged value to ensure that it is not changed unexpectedly.

How To Fix

1. Check the error log for the MySQL 1842 error:
$ tail -f /var/log/mysql/error.log
2. Check the MySQL configuration file for any misconfigurations:
$ cat /etc/mysql/my.cnf
3. Check the MySQL server status to see if it is running:
$ mysqladmin status
4. Check the MySQL server process list to see if there are any long-running queries:
$ mysqladmin processlist
5. Check the MySQL server variables to see if any of them are set incorrectly:
$ mysqladmin variables
6. Check the MySQL server connections to see if there are any connections that are not being closed properly:
$ mysqladmin connections
7. Check the MySQL server tables to see if any of them are corrupted:
$ mysqladmin tables
8. If the issue persists, use an automated database observability tool to monitor and fix the MySQL 1842 in question. Automated database observability tools can provide real-time insights into the performance and health of the database, allowing for quick and easy troubleshooting and resolution of issues.

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