CGLIB runtime enhancement not supported on native image with Spring Boot 4

[Vadym79]

I have an example application which uses Spring Boot 4, Spring JPA with Hibernate, PostgreSQL database. The goal is to produce a GraalVM Native Image deploy it on AWS Lambda as Custom Runtime. The issue should be reproducable by simply running the native image without AWS Lambda.

During start up of AWS Lambda, I got the following exception:

Caused by: java.lang.UnsupportedOperationException: CGLIB runtime enhancement not supported on native image. Make sure to enable Spring AOT processing to pre-generate 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean$$SpringCGLIB$$0' at build time.

It's coming from definition of the PlatformTransactionManager in the PersistenceJPAConfig.java used to create LocalContainerEntityManagerFactoryBean.

I expect that this class org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean$$SpringCGLIB$$0 should be generated at the compile time as I use Spring AOT processor in pom.xml.

What I'm doing wrong?

The only way I found to currently mitigate the issue, is to use @Configuration(proxyBeanMethods = false) in the PersistenceJPAConfig, but I have an impression that I'm loosing performance by not proxying the bean methods.

[wilkinsona]

The only way I found to currently mitigate the issue, is to use @configuration(proxyBeanMethods = false) in the PersistenceJPAConfig, but I have an impression that I'm loosing performance by not proxying the bean methods.

Not proxying bean methods is recommended. Removing the proxy improves performance and reduces memory usage. All of Boot's configuration classes disable the proxying of bean methods for this reason.

In your case, you should change this line. Instead of calling one @Bean method from another you should inject the DataSource into your entityManagerFactory method, in the same way as you're already injecting PersistenceManagedTypes.

[Vadym79]

@wilkinsona Thanks for the suggestion! I now changed the code and it executes much faster in the native image.