How It Affects Your App
The error ER_SLAVE_WAS_NOT_RUNNING indicates that the slave server is not running, which can have a significant impact on an application. If the slave server is not running, the application will not be able to replicate data from the master server, which can lead to data loss or inconsistency. Additionally, the application may not be able to access the data stored in the slave server, which can lead to performance issues. In some cases, the application may not be able to function properly without the slave server running.
How To Fix
1. Check the error log for the MySQL 1255 error. This can be done by running the following command:
mysql> SHOW GLOBAL VARIABLES LIKE 'log_error';
2. Check the server configuration for the MySQL 1255 error. This can be done by running the following command:
mysql> SHOW GLOBAL VARIABLES LIKE 'max_allowed_packet';
3. Increase the value of the max_allowed_packet variable. This can be done by running the following command:
mysql> SET GLOBAL max_allowed_packet=1073741824;
4. Restart the MySQL server. This can be done by running the following command:
mysql> sudo service mysql restart
5. Use an automated database observability tool to monitor and fix the MySQL 1255 in question. Automated database observability tools can help identify and diagnose MySQL errors quickly and accurately. They can also provide real-time insights into the performance of the database, allowing for proactive monitoring and troubleshooting.
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