In the init() method of JBoss Log Manager, it tries to read logger plugin system property "org.jboss.logging.Logger.pluginClass" .
I would expect at least in case of class not found exception, it should have been thrown as an error instead of ingnoring the exception and loading the default.
Though i have kept my custom plugin class in jboss lib, Class Loader is not able to load my plugin class and there is no exception on console.
When looked at the code for org.jboss.logging.LogManager found that irrespective of type of exception, it is simply ignoring the exception and loading default org.jboss.logging.NullLoggerPlugin.
