hibernate/hibernate-orm · error · HibernateException

Bytecode enhancement failed for entity '{}'

Error message

Bytecode enhancement failed for entity '{}'

What it means

Error "Bytecode enhancement failed for entity '{}'" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/proxy/pojo/bytebuddy/ByteBuddyProxyHelper.java:129

		);

		// note: interface is assumed to already contain HibernateProxy.class
		try {
			final var proxyClass = buildProxy( proxy.getPersistentClass(), proxy.getInterfaces() );
			final var instance = (PrimeAmongSecondarySupertypes) proxyClass.getDeclaredConstructor().newInstance();
			final var proxyConfiguration = instance.asProxyConfiguration();
			if ( proxyConfiguration == null ) {
				throw new HibernateException( "Produced proxy does not correctly implement ProxyConfiguration" );
			}
			proxyConfiguration.$$_hibernate_set_interceptor( interceptor );
			final var hibernateProxy = instance.asHibernateProxy();
			if ( hibernateProxy == null ) {
				throw new HibernateException( "Produced proxy does not correctly implement HibernateProxy" );
			}
			return hibernateProxy;
		}
		catch (Throwable t) {
			throw new HibernateException( "Bytecode enhancement failed for entity '"
					+ proxy.getEntityName() + "'", t );
		}
	}

	private static Method resolveIdGetterMethod(SerializableProxy serializableProxy) {
		if ( serializableProxy.getIdentifierGetterMethodName() == null ) {
			return null;
		}

		try {
			return serializableProxy.getIdentifierGetterMethodClass()
					.getDeclaredMethod( serializableProxy.getIdentifierGetterMethodName() );
		}
		catch (NoSuchMethodException e) {
			throw new HibernateException(
					String.format(
							Locale.ENGLISH,
							"Unable to deserialize proxy [%s, %s]; could not locate id getter method [%s] on entity class [%s]",

View on GitHub (pinned to fad1729dce)

Solutions

1. Check the nested cause of the enhancement failure for the entity.
2. Ensure the entity has an accessible constructor and valid hierarchy.

When it happens

Trigger: A runtime precondition of the Hibernate API is violated.

Common situations: Occurs when application code or configuration does not satisfy the documented contract of the API being called.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/4517bdb9aa15ebad. Report an issue: GitHub.