hibernate/hibernate-orm · error · HibernateException

Using the ReflectionOptimizer is not possible when the confi

Error message

Using the ReflectionOptimizer is not possible when the configured BytecodeProvider is 'none'. Use a different BytecodeProvider

What it means

Error "Using the ReflectionOptimizer is not possible when the configured BytecodeProvider is 'none'. Use a different BytecodeProvider" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/bytecode/internal/none/BytecodeProviderImpl.java:44

 *
 * @since 5.4
 */
public final class BytecodeProviderImpl implements BytecodeProvider {

	@Nonnull
	@Override
	public ProxyFactoryFactory getProxyFactoryFactory() {
		return new NoProxyFactoryFactory();
	}

	@Override
	@Nonnull
	public ReflectionOptimizer getReflectionOptimizer(
			@Nonnull Class<?> clazz,
			@Nonnull String[] getterNames,
			@Nonnull String[] setterNames,
			@Nonnull Class<?>[] types) {
		throw new HibernateException( "Using the ReflectionOptimizer is not possible when the configured BytecodeProvider is 'none'. Use a different BytecodeProvider" );
	}

	@Override
	public @Nullable ReflectionOptimizer getReflectionOptimizer(@Nonnull Class<?> clazz, @Nonnull Map<String, PropertyAccess> propertyAccessMap) {
		return null;
	}

	@Override
	public @Nullable Enhancer getEnhancer(@Nonnull EnhancementContext enhancementContext) {
		return null;
	}
}

View on GitHub (pinned to fad1729dce)

Solutions

1. Remove the hibernate.bytecode.provider=none setting (or set it to bytebuddy) so proxies/reflection optimization can be generated, or avoid features requiring proxies.

Example fix

Remove the hibernate.bytecode.provider=none setting (or set it to bytebuddy) so proxies/reflection optimization can be generated, or avoid features requiring proxies.

When it happens

Trigger: Bytecode enhancement, proxy creation, or lazy interception is applied to an incompatible class or configuration.

Common situations: Build-time enhancement with module-system restrictions, mismatched Hibernate versions between build and runtime, or hibernate.bytecode.provider=none with a model that needs proxies.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/5e63785fb14f7c87. Report an issue: GitHub.