Issues with Spring Boot and Hibernate Caching Leading to Stale Data Retrieval
I'm converting an old project and I'm experiencing a problem with data caching in my Spring Boot application that uses Hibernate. I'm using Spring Boot 2.5.4 and Hibernate 5.4.32. I've enabled second-level caching with Ehcache, but I'm noticing that when I update an entity, the subsequent reads still return stale data from the cache instead of fetching the updated entity from the database. Here’s my configuration for enabling caching in `application.properties`: ```properties spring.jpa.properties.hibernate.cache.region.factory_class=org.hibernate.cache.jcache.JCacheRegionFactory spring.jpa.properties.hibernate.cache.use_second_level_cache=true spring.jpa.properties.hibernate.cache.use_query_cache=true ``` I've also annotated my entity class with `@Cacheable`: ```java @Entity @Cacheable public class Product { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private String name; private double price; // getters and setters } ``` When I update a product entity like this: ```java @Transactional public void updateProduct(Long productId, String newName, double newPrice) { Product product = productRepository.findById(productId).orElseThrow(() -> new EntityNotFoundException("Product not found")); product.setName(newName); product.setPrice(newPrice); productRepository.save(product); } ``` After the update, I expect subsequent calls to `findById` to return the updated data. However, after the update, if I call `productRepository.findById(productId).get()`, it still returns the old name and price. I’ve confirmed that the database reflects the updates correctly. To troubleshoot, I've added logging for Hibernate SQL statements, and I can see that the queries to fetch the product are being executed, but the data returned is stale. I've also tried calling `entityManager.clear()` after updates, but that didn’t resolve the issue either. Any insights into why the cache might not be invalidating or refreshing correctly would be greatly appreciated. Are there any specific caching configurations or practices I might be missing? Is there a simpler solution I'm overlooking?