spring-projects/spring-framework · error · BeanCreationException

Invalid autowire-marked constructor: ${candidate}. Found con

Error message

Invalid autowire-marked constructor: ${candidate}. Found constructor with 'required' Autowired annotation already: ${requiredConstructor}

What it means

Error "Invalid autowire-marked constructor: ${candidate}. Found constructor with 'required' Autowired annotation already: ${requiredConstructor}" thrown in spring-projects/spring-framework.

Source

Thrown at spring-beans/src/main/java/org/springframework/beans/factory/annotation/AutowiredAnnotationBeanPostProcessor.java:398

							continue;
						}
						MergedAnnotation<?> ann = findAutowiredAnnotation(candidate);
						if (ann == null) {
							Class<?> userClass = ClassUtils.getUserClass(beanClass);
							if (userClass != beanClass) {
								try {
									Constructor<?> superCtor =
											userClass.getDeclaredConstructor(candidate.getParameterTypes());
									ann = findAutowiredAnnotation(superCtor);
								}
								catch (NoSuchMethodException ex) {
									// Simply proceed, no equivalent superclass constructor found...
								}
							}
						}
						if (ann != null) {
							if (requiredConstructor != null) {
								throw new BeanCreationException(beanName,
										"Invalid autowire-marked constructor: " + candidate +
										". Found constructor with 'required' Autowired annotation already: " +
										requiredConstructor);
							}
							boolean required = determineRequiredStatus(ann);
							if (required) {
								if (!candidates.isEmpty()) {
									throw new BeanCreationException(beanName,
											"Invalid autowire-marked constructors: " + candidates +
											". Found constructor with 'required' Autowired annotation: " +
											candidate);
								}
								requiredConstructor = candidate;
							}
							candidates.add(candidate);
						}
						else if (candidate.getParameterCount() == 0) {
							defaultConstructor = candidate;

View on GitHub (pinned to e8729d0438)

When it happens

Trigger: Thrown at spring-beans/src/main/java/org/springframework/beans/factory/annotation/AutowiredAnnotationBeanPostProcessor.java:398 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of spring-projects/spring-framework@e8729d0438 (2026-08-04). Data as JSON: /data/errors/cadf228f883cd30b.json. Report an issue: GitHub.