ClassCastException During Startup with mysql-connector-java version 8.0.23
Description
When starting Tomcat with mysql-connector-java version 8.0.23, the following errors can occur:
- Change log lock is acquired and released repeatedly
- "Error creating bean" for many named items
- NoSuchBeanDefinitionException
- BeanCreationException
- ClassCastException
This issue is a result of a change made in MySQL Connector/J 8.0.23. The release notes state the following relevant change:
"a getObject(columnIndex) call on a DATETIME column returns a LocalDateTime object now instead of a String. To receive a String like before, use getObject(columnIndex, String.class) instead."
This change is causing liquibase to fail. Please refer to the following liquibase issue for more details:
"Support drivers that return a LocalDateTime for dates" https://github.com/liquibase/liquibase/pull/1664
Workaround
- Replace the mysql-connector-java-8.0.23.jar file under <FNCI_INSTALL_DIR>/tomcat/lib with mysql-connector-java version 8.0.22 or earlier.
- Restart Tomcat
Resolution
A fix will be determined after changes have been made to liquibase or the latest MySQL connector. This issue is being tracked under Issue# SCA-32509.
