Duel Classloading of javax.activation module from activation.jar

Issue

• There is a strange claasloading problem with legacy webservices since upgrading from JBoss EAP 4.3 to JBoss EAP 6.x.

• The javax.activation.DataHandler from the activation jar is getting loaded by two different classloaders. The two classloaders are:

• The bootstrap classloader. The classloader for the DataHandler class object is found to be 'null'.

• The JBoss module classloader for the “javax.activation.api:main” module.

• Why is the activation jar getting loaded by two different classloaders in EAP-6.x while this was loaded by a single classloader in the previous versions ?

• Is this is a known issue with EAP 6.x ?
• Can the module classloader for javax.activation be disabled ?
• What are the implications of disabling the module classloader for javax activation ?

• Is there a way to tweak JBoss to load the classes from the same classloader ?

• The code snippet that provides the conclusion about this is highligthed below :

Class xsiClass = context.getTypeMapping().getClassForQName(type);
                  System.err.println("new code called");
                  final ClassLoader classLoader = destClass.getClassLoader();
                  //additional classloader diagnostics
                  System.err.println("xsi class xsiClass = context.getTypeMapping().getClassForQName(type).getClassLoader()=" + context.getTypeMapping().getClassForQName(type).getClassLoader());
                  System.err.println("destination class classLoader=" + classLoader);
                  System.err.println(destClass.getProtectionDomain().getCodeSource().getLocation());