There are 3 incorrect double-checked locking cases in ClassInfo:
    private List<Method> methods;
    private Map<String,PropertyInfo> properties;
    private Map<String,EventSetInfo> eventSets;

For example:

    public List<Method> getMethods() {
        if (this.methods == null) {
            synchronized (this.mutex) {
                if (this.methods == null) {
                    this.methods = MethodInfo.get(this.type);
                }
            }
        }
        return this.methods;
    }

'methods' is not volatile and read multiple times. This makes it an incorrect DCL.