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

[joaemel]

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 version 3.2.11.

[christophstrobl]

Thank you for reaching out.
data-jpa:3.2.x is out of OSS maintenance since end of 2024. Do you experience the same behaviour with more recent 3.4.x? If so, it would be great if you could take the time to provide a complete minimal sample (something that we can unzip or git clone, build, and deploy) that reproduces the problem.

[joaemel]

Minimal, up-to-date (version 3.5.2) spring boot example demonstrating the issue with a failing test:

reproduce.tar.gz

[christophstrobl]

Thanks for sharing the reproducer - that's an interesting issue. Let me take this to the team.
Maybe implementing SmartInitializingSingleton is enough to make sure the cache is properly cleared.

[christophstrobl]

@joaemel could you please report the issue to the spring-boot project and link this one here. Thank you!

[joaemel]

Fixed as part of the linked spring-boot Ticket.

Thanks for the quick responses. ❤️