Page History
...
(its default value was true), otherwise you will get an error "connection is read-only. Queries leading to data modification are not allowed". MS SQL and ORACLE have the similar failover settings in their JDBC connection strings. In MS SQL, it is called "failoverPartner"
References
https://dev.mysql.com/doc/connector-j/5.1/en/connector-j-config-failover.html