Application startup fails in AOT mode using multiple entity managers

[hendrik-frahmann-nmc]

I have a Spring Boot 4 project with multiple @EnableJpaRepositories configurations.
When I run the application without AOT it's working fine.
But if I package it with AOT and execute it with AOT enabled I get this exception:

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'secondRepository': Not a managed type: class org.example.second.SecondEntity
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1817) ~[spring-beans-7.0.1.jar:7.0.1]
	...
Caused by: java.lang.IllegalArgumentException: Not a managed type: class org.example.second.SecondEntity
	at org.hibernate.metamodel.model.domain.internal.JpaMetamodelImpl.managedType(JpaMetamodelImpl.java:247) ~[hibernate-core-7.1.8.Final.jar:7.1.8.Final]
	at org.hibernate.metamodel.model.domain.internal.MappingMetamodelImpl.managedType(MappingMetamodelImpl.java:413) ~[hibernate-core-7.1.8.Final.jar:7.1.8.Final]
	at org.hibernate.metamodel.model.domain.internal.MappingMetamodelImpl.managedType(MappingMetamodelImpl.java:88) ~[hibernate-core-7.1.8.Final.jar:7.1.8.Final]

Demo Project:
If you just change the Spring Boot Version in this project to 3.5.8 it's working, but not with 4.0.0.

https://github.com/hendrik-frahmann-nmc/spring-boot-4-multi-jpa-demo

[christophstrobl]

Thank you @hendrik-frahmann-nmc for reporting and the reproducer.

The generated SecondRepository__BeanDefinitions unfortunately does not seem to recognise the EntityManager reference in all spots correctly and just defines a RuntimeBeanReference. This then picks up the primary one, leading to the error you describe.

public static BeanDefinition getSecondRepositoryBeanDefinition() {
    //...
    beanDefinition.getPropertyValues().addPropertyValue("entityManager", new RuntimeBeanReference(EntityManager.class));

This is likely due to BeanDefinitionPropertyValueCodeGeneratorDelegates not passing on the bean name in case of RuntimeBeanReference.

[mp911de]

I've filed spring-projects/spring-framework#35913 to fix the issue.