DRAFT SP-6071 Tomcat startup fails with "ClassCastException" exception

Symptoms

Tomcat fails to startup with the following message in the application server log when installing Appian with MySql 8 and MySql driver version 8.0.23:

Caused by: java.lang.ClassCastException: java.time.LocalDateTime cannot be cast to java.lang.String
	at liquibase.changelog.StandardChangeLogHistoryService.getRanChangeSets(StandardChangeLogHistoryService.java:328)
	at liquibase.changelog.AbstractChangeLogHistoryService.upgradeChecksums(AbstractChangeLogHistoryService.java:66)

Cause

This is related to a bug introduced in MySql driver version 8.0.23. Appian does not support MySql driver version 8.*.

Action

Update the database driver to the supported version and restart the application server.

Affected Versions

This article applies to Appian 19.1 and later.

Last Reviewed: May 2020