I get a similar error:
I've tried also JBoss 3.0.3 + Tomcat 4.0.5 and JBoss 3.0.2 + Tomcat 4.0.4: same problem!
To resolve the problem I've edited the file tomcat41-service.xml...
Does this bundle require the use of JDK 1.4?
This JDK is not yet available on AIX 4.3.3.
It turns out that the classpath set in tomcat41-service.xml is relative to the current directory.
If, for instance, you are in the jboss-3.0.3_tomcat-4.1.12/bin/
directory when you run jboss-3.0.3_tomcat-4.1.12/bin/run.sh, the classpath will be set properly and
you won't need to change the tomcat41-service.xml