JOnAS 2.5 supports two versions of Tomcat for the tomcat service: Tomcat 3.3.x (as in JOnAS 2.4.4) and Tomcat 4.0.x. The default support of JOnAS 2.4.4 is for Tomcat 3.3.x, therefore nothing needs to be changed if the tomcat service was being used with JOnAS 2.4.4. For Tomcat 4.0.x, the jonas.service.tomcat.class property of the jonas.properties file must be set to org.objectweb.jonas.tomcat.EmbeddedTomcatImpl40. Refer to Chapter 31 Integrating Tomcat and JOnAS (for JOnAS version < JOnAS 2.6) for more details.
Starting with JOnAS 2.5, the Objectweb Monolog (http://www.objectweb.org/monolog/doc/index.html) logging API is used for JOnAS traces. The JOnAS traces configuration file JONAS_ROOT/conf/trace.properties has changed. Refer to Chapter 3 JOnAS Configuration for details.