In Spring native: Generation of HibernateProxy instances at runtime is not allowed when the configured BytecodeProvider

Question

I have a User entity that has Lazy relations

 @JoinTable(name = "user_identities", joinColumns = {
            @JoinColumn(name = "user_id")}, inverseJoinColumns = {
            @JoinColumn(name = "user_identity_id")})
    @OneToMany(fetch = FetchType.LAZY, orphanRemoval = true)
    private Set<Identity> identities;

    @JoinTable(name = "user_roles", joinColumns = {
            @JoinColumn(name = "user_id")}, inverseJoinColumns = {
            @JoinColumn(name = "role_id")})
    @OneToMany(fetch = FetchType.LAZY)
    private Set<Role> roles;

I execute hibernate

@Query("SELECT u FROM User u JOIN u.identities i JOIN FETCH u.roles r WHERE i.sub = :sub AND i.issuer = :issuer")
Optional<User> findByIdentitySubAndIssuer(String sub, String issuer);

In jvm mode (not native) everything works fine, but in native image, i am getting the following error:

Generation of HibernateProxy instances at runtime is not allowed when the configured BytecodeProvider is 'none'; your model requires a more advanced BytecodeProvider to be enabled..

I am using spring boot 3.1.0

Hibernate version 6.2.2 Final

I was trying to enable hibernate enhancer, adding to properties jpa: properties: hibernate: enhancer: enable: true

which resulted in another exception on application startup in native mode Failed to initialize JPA EntityManagerFactory: Default-resolver threw exception Could not instantiate named strategy class [org.hibernate.boot.model.relational.ColumnOrderingStrategyStandard]

UPDATE: with id 'org.springframework.boot' version '3.0.7' and id 'org.hibernate.orm' version "6.1.7.Final

still getting In Spring native: Generation of HibernateProxy instances at runtime is not allowed when the configured BytecodeProvider

Please help. tnx

Answer 1

As described in this Spring issue, you need to provide bytecode enhancement at build time through hibernate-enhance-maven-plugin

gradle

plugins {
    id "org.hibernate.orm" version "<version-to-use>"
}

hibernate {
    enhancement {
        lazyInitialization true
    }
}

maven

    <plugin>
        <groupId>org.hibernate.orm.tooling</groupId>
        <artifactId>hibernate-enhance-maven-plugin</artifactId>
        <version>$currentHibernateVersion</version>
        <executions>
            <execution>
                <configuration>
                    <failOnError>true</failOnError>
                    <enableLazyInitialization>true</enableLazyInitialization>
                </configuration>
                <goals>
                    <goal>enhance</goal>
                </goals>
            </execution>
        </executions>
    </plugin>

Also consider that in latest Hibernate version 6.2, enableLazyInitialization param used in the plugin has been deprecated and enabled by default : HHH-15641

For more information about bytecode enhancement see Hibernate docs