👀 Views: 99 💬 Answers: 1 📅 Created: 2025-09-06

java spring mongodb transaction spring-data Java

I've searched everywhere and can't find a clear answer. I can't seem to get I tried several approaches but none seem to work... I'm facing an issue where data retrieved from a MongoDB database using Spring Data is stale when employing the `@Transactional` annotation in a service method. The method is supposed to save an entity and then immediately retrieve it for verification, but it seems to be returning the old data. Here's a simplified version of my code: ```java @Service public class UserService { @Autowired private UserRepository userRepository; @Transactional public User createUserAndFetch(String username) { User user = new User(username); userRepository.save(user); return userRepository.findByUsername(username); } } ``` I'm using Spring Boot version 2.5.4 and Spring Data MongoDB version 2.3.4. The MongoDB instance is running locally, and the connection is configured properly in `application.properties`: ```properties spring.data.mongodb.uri=mongodb://localhost:27017/testdb ``` When I call the `createUserAndFetch` method, the data is saved as expected, but the subsequent `findByUsername` call returns a previous version of the user instead of the newly created one. I tried flushing the repository manually with `userRepository.flush();` after the save, but it didn't help. I also verified that the transaction is committed before the fetch by checking logs. Additionally, I have tried adding `@EnableTransactionManagement` to my main application class, but the issue persists. Could this be related to MongoDB's behavior with transactions, or am I missing something in my Spring configuration? Any insights would be greatly appreciated! This is part of a larger service I'm building. For reference, this is a production application. What's the best practice here? My team is using Java for this microservice. Has anyone else encountered this?