如何在Spring Boot异步功能中处理未捕获的异常？

Question

The async function, in case of any uncaught exception stops without throwing out any lines of error on the console. If the function is not marked async, then the logs corresponding to it are printed.

@Async  
public CompletableFuture<?> AsyncManager() {
    logger.info("Executing method asynchronously - " + Thread.currentThread().getName());

    HashMap<String, String> map = new HashMap<>();
    map.get("Hello").length();

    return CompletableFuture.completedFuture(map); 
  }

The above code is a snippet. I understand that it will throw null pointer exception and i have deliberately set it up that way.

ERROR -Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPointerException: null

When the function is marked @Async it shows nothing at the line ie

map.get("Hello").length();

I understand that this might be because the exceptions are not propagated to the main thread. How do i handle the exceptions in async functions?

Answer 1

将整个代码放在try and catch（ex exException）中并记录该异常。