How It Affects Your App
The impact of MySQL 1735 ER_UNKNOWN_PARTITION on an application is that it prevents the application from accessing a partition that does not exist. This can cause the application to fail to execute queries, or to return incorrect results. It can also lead to data corruption or data loss, as the application may attempt to write to a partition that does not exist. In addition, it can cause the application to become unresponsive or crash.
How To Fix
1. Check the error log for the MySQL 1735 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 any queries are running for a long time:
$ mysqladmin -u root -p processlist
4. Check the MySQL status to see if there are any issues with the server:
$ mysqladmin -u root -p status
5. Check the MySQL variables to see if any of them are set incorrectly:
$ mysqladmin -u root -p variables
6. Check the MySQL user privileges to see if any of them are set incorrectly:
$ mysql -u root -p -e "SELECT * FROM mysql.user;"
7. Check the MySQL database tables to see if any of them are corrupted:
$ mysqlcheck -u root -p --all-databases
8. Check the MySQL replication status to see if any of the slaves are lagging:
$ mysqlrplshow -u root -p
9. Check the MySQL query cache to see if it is enabled and configured correctly:
$ mysql -u root -p -e "SHOW VARIABLES LIKE 'query_cache_%';"
10. Finally, use an automated database observability tool to monitor and fix the MySQL 1735 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 fix any issues that may arise.