MySQL 3084

This error indicates that the slave channel was not running when attempting to start the replication process.

How It Affects Your App

The error ER_SLAVE_CHANNEL_WAS_NOT_RUNNING indicates that the replication channel between the master and slave servers is not running. This can have a significant impact on the application as it will not be able to replicate data from the master server to the slave server. This can lead to data loss or inconsistency between the master and slave servers, which can cause application errors or data corruption. Additionally, the application may not be able to access the data stored on the slave server, leading to further issues.

How To Fix

1. Check the error log for the MySQL 3084 error. This can be done by running the following command:
mysql> SHOW GLOBAL VARIABLES LIKE 'log_error';
2. Check the MySQL configuration file for the max_allowed_packet setting. This can be done by running the following command:
mysql> SHOW VARIABLES LIKE 'max_allowed_packet';
3. Increase the max_allowed_packet setting in the MySQL configuration file. 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 3084 in question. Automated database observability tools can help identify and diagnose MySQL errors quickly and accurately. They can also provide real-time alerts when errors occur, allowing for faster resolution times.

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