protected void mergeChangesIntoParent() {
        if (this.classesToBeInvalidated != null) {
            // get identityMap of the parent ServerSession
            for(ClassDescriptor classToBeInvalidated : classesToBeInvalidated) {
                IdentityMapAccessor accessor = this.getParentIdentityMapSession(classToBeInvalidated, false, true).getIdentityMapAccessor();
                accessor.invalidateClass(classToBeInvalidated.getJavaClass(), false); // 312503: invalidate subtree rooted at classToBeInvalidated
            }            
            this.classesToBeInvalidated = null;
        }
        super.mergeChangesIntoParent();
    }