MySQL 1843

This error indicates that the GTID value that was executed has been changed. It is a MySQL 1843 error that occurs when a transaction is attempted with a GTID that has already been executed.

How It Affects Your App

MySQL 1843 ER_GTID_EXECUTED_WAS_CHANGED indicates that the Global Transaction Identifier (GTID) of a transaction has been changed. This can have a significant impact on an application as it can lead to data inconsistency and data loss. It can also cause the application to become unresponsive or crash due to the inconsistency in the data. Furthermore, it can lead to incorrect results being returned from queries and can cause the application to become unreliable.

How To Fix

1. Check the error log for the MySQL 1843 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 process list to see if there are any processes that are running that shouldn't be:
$ mysqladmin -u root -p processlist
4. Check the MySQL user table to see if there are any users that shouldn't have access:
$ mysql -u root -p -e "SELECT * FROM mysql.user;"
5. Check the MySQL privileges table to see if there are any privileges that shouldn't be granted:
$ mysql -u root -p -e "SELECT * FROM mysql.user_privileges;"
6. Check the MySQL grant tables to see if there are any grants that shouldn't be granted:
$ mysql -u root -p -e "SELECT * FROM mysql.grant_tables;"
7. Check the MySQL system variables to see if there are any variables that are set incorrectly:
$ mysql -u root -p -e "SHOW VARIABLES;"
8. Check the MySQL system status to see if there are any issues that need to be addressed:
$ mysql -u root -p -e "SHOW STATUS;"
9. Once all of the above steps have been completed, it is recommended to use an automated database observability tool to monitor and fix the MySQL 1843 in question. This tool can provide real-time insights into the performance and health of the database, as well as alerting when any issues arise. This can help to quickly identify and fix any issues that may arise, as well as prevent any future issues from occurring.

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