In method _configureEnumerator, each encountered non-static enumerator is registered using its classname for id.

This prevent from using twice the same class for two enumerators

The id is never used after (since we keep a pointer on the object)

here is a patch

String role = enumeratorClassName + "$" + StringUtils.generateKey();
...
_enumeratorManager.addComponent(_pluginName, null, role, enumeratorClass, customEnumerator);
...
_enumeratorsToLookup.put(prefix, role);