Explanation of the second level cache code in Hibernate?

问题

I have the two following entities

@Cachable
class Book{
...

@ManyToOne
Publisher publisher;
}

---

@Cachable{
class Publisher{
...
}

I have the following test code,

@Test
public void test{
stats = sessionFactory.getStatstics();
...
Book book = session.byId(Book.class).load(1);
Book book2 = session.byId(Book.class).load(1);

assertEquals(stats.getSecondLevelCacheHitCount,0);
assertEquals(stats.getSecondLevelCacheMissCount,1);
assertEquals(stats.getSecondLevelCachePutCount,2);

}

Why the cache miss count is 1 and cache put count is 2? Shouldn't cache miss count be 2, if cache put count is 2?

来源：https://stackoverflow.com/questions/64320669/explanation-of-the-second-level-cache-code-in-hibernate