Using asynchronous EJB call via @Asynchronous annotation leads to class loader leak. This was reported in WildFly upstream https://issues.jboss.org/browse/WFLY-1375 and was fixed there. The bug is applicable to EAP 6 too.
Verified in EAP 6.2.0.ER1.
Assigning jpai EJB issues to david.lloyd. Please re-assign to Cheng or others as needed.