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When using Tomcat as the application server and a database and/or driver configured for XA transactions, the following error is seen in the application server log:
SEVERE [localhost-startStop-1] org.apache.tomcat.util.modeler.Registry.registerComponent Null component Catalina:type=DataSource,host=localhost,context=/suite,class=javax.sql.XADataSource,name="jdbc/AppianPrimaryDS"
Tomcat does not support XA database transactions.
Use one of the supported database configurations in the System Requirements documentation.
This article applies to Appian 18.3 and later.
Last reviewed: December 2018