Logged messages (at least those with level INFO+) should be printed with IDs which are persistent. This is required because some users use log parsing which depends on having message IDs. In addition, messages without IDs can't be internationalized.

JBoss Modules contains at minimum this log message without ID:

15:35:38,686 INFO  [org.jboss.modules] (main) JBoss Modules version
1.6.0.Beta3