There seems to be a typo in org.jboss.logging.LoggingProviders in the method tryLog4j(): the logging provider implementation used is Log4j2LoggerProvider, whereas it should be Log4jLoggerProvider.

The net effect is that if I have log4j jars on the classpath and include a log4j configuration, the configuration gets parsed but log4j is not used as the logging provider; instead, JDK logging provider is used.