At startup, Wildfly checks that the default log manager (as returned by java.util.logging.LogManager.getLogManager() ) is org.jboss.logmanager.LogManager:
https://github.com/wildfly/wildfly-core/blob/master/logging/src/main/java/org/jboss/as/logging/LoggingExtension.java#L146

This breaks some cases where the LogManager is wrapped because of the needs of that particular JVM like in OSv ( https://github.com/cloudius-systems/osv/blob/master/java/runjava/src/main/java/io/osv/jul/LogManagerWrapper.java ).

As suggested on the mailing list, I would like to propose adding a property to bypass that check. Something along the lines of "jboss.logging.logManagerCheck = false/true"