Orchestrator: Master’s Read-Only Flag Checker

Here We know the orchestrator takes care of read-only flag once we perform the failovers. but suppose our master node’s MySQL service is restarted due to accidentally or crash or OOM issue then once the MySQL service will be up on the master node, we will have to manually connect the node and disable the read-only flag, so the application can resume their write hits.

Relay log read failure

Last_Errno: 1594
Last_Error: Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master’s binary log is corrupted (you can check this by running ‘mysqlbinlog’ on the binary log), the slave’s relay log is corrupted (you can check this by running ‘mysqlbinlog’ on the relay log), a network problem, or a bug in the master’s or slave’s MySQL code. If you want to check the master’s binary log or slave’s relay log, you will be able to know their names by issuing ‘SHOW SLAVE STATUS’ on this slave.