MySQL 8.0.22 was released on Oct 19, 2020, and came with nice features and a lot of bug fixes. Now, you can configure your async replica to choose the new source in case the existing source connection (IO thread) fails. In this blog, I am going to explain the entire process involved in this configuration [&]

https://www.percona.com/blog/2020/10/26/mysql-8-0-22-asynchronous-replication-automatic-connection-io-thread-failover/