#vulnerable code 
                                public static long generateUUID() {
        long id = UUID.incrementAndGet();
        if (id >= UUID_INTERNAL * (serverNodeId + 1)) {
            synchronized (UUID) {
                if (UUID.get() >= id) {
                    id -= UUID_INTERNAL;
                    UUID.set(id);
                }
            }
        }
        return id;
    } 
                            #location 3 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                public static long generateUUID() {
        long id = UUID.incrementAndGet();
        if (id >= getMaxUUID()) {
            synchronized (UUID) {
                if (UUID.get() >= id) {
                    id -= UUID_INTERNAL;
                    UUID.set(id);
                }
            }
        }
        return id;
    }