👀 Views: 52 💬 Answers: 1 📅 Created: 2025-06-07

spring-boot asynchronous nullpointerexception Java

I'm relatively new to this, so bear with me... I'm working with a `NullPointerException` when trying to implement asynchronous processing in my Spring Boot 3.0 application using `@Async`. I have a service method that is supposed to run in a separate thread, but it seems like some of the dependencies are not being injected properly. Here’s the code snippet for my service: ```java @Service public class MyService { @Autowired private SomeDependency someDependency; @Async public void processAsync() { System.out.println("Processing asynchronously..."); someDependency.doSomething(); // This line throws NullPointerException } } ``` I have also configured the `@EnableAsync` annotation in my main application class: ```java @SpringBootApplication @EnableAsync public class MyApplication { public static void main(String[] args) { SpringApplication.run(MyApplication.class, args); } } ``` I verified that `SomeDependency` is properly annotated with `@Service`. The method `doSomething()` should not return null, but it looks like `someDependency` itself is null when `processAsync()` gets executed. I noticed that this scenario seems to occur intermittently, specifically under load when multiple asynchronous tasks are invoked. I’ve tried to make `SomeDependency` a `@Component` and ensured that it is in the same package or a sub-package of the main application class, but the question continues. Could this be related to the way the application context is handling the async execution? Any insights into resolving this would be greatly appreciated! For context: I'm using Java on Windows. Am I missing something obvious?