Memory not freed on context restart in JpaMetamodel#CACHE with spring.main.lazy-initialization=true

[joaemel]

Upon request, I am re-reporting an bug here, original here: spring-projects/spring-data-jpa#3957

When spring.main.lazy-initialization is true, the LazyInitializationBeanFactoryPostProcessor makes the JpaMetamodelCacheCleanup bean lazy, causing the cleanup to never happen. This manifests in OOMs when running lots of tests with DirtiesContext.

Adding this bean to the context:

    @Bean
    public static LazyInitializationExcludeFilter integrationLazyInitializationExcludeFilter() {
        return (beanName, beanDefinition, beanType)
            -> beanName.equals("org.springframework.data.jpa.util.JpaMetamodelCacheCleanup");
    }

Works around the issue.

This issue was observed in spring boot 3.2.11 and, upon request, I created a minimal reproducing sample project including a failing test, using up-to-date (3.5.4) spring boot:

reproduce.tar.gz