In previous versions of JBoss EAP 6, it was found that loggers were sometimes garbage collected early resulting in loss of the loggers and configuration. For example, if a logger had an appender assigned, when the logger is garbage collected a new logger would have been created without the appender attached.
In this release of the product, the map of loggers has been changed to use a strong reference rather than a weak reference. This causes the loggers not to get garbage collected and things to work as they should. As a result custom loggers are now honored as expected.