hibernate/hibernate-orm · error · LazyInitializationException

Could not retrieve real entity name [{}#{}] - no session

Error message

Could not retrieve real entity name [{}#{}] - no session

What it means

Error "Could not retrieve real entity name [{}#{}] - no session" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/proxy/AbstractLazyInitializer.java:367

		return target;
	}

	@Override
	public final void setImplementation(Object target) {
		this.target = target;
		initialized = true;
	}

	@Override
	public final Object getImplementation(SharedSessionContractImplementor session) throws HibernateException {
		final var entityKey = generateEntityKeyOrNull( getInternalIdentifier(), session, getEntityName() );
		return entityKey == null ? null : session.getPersistenceContext().getEntity( entityKey );
	}

	@Override
	public String getImplementationEntityName() {
		if ( session == null ) {
			throw new LazyInitializationException( "Could not retrieve real entity name ["
					+ entityName + "#" + id + "] - no session" );
		}
		if ( getEntityDescriptor().hasSubclasses() ) {
			initialize();
			return getFactory().bestGuessEntityName( target );
		}
		return entityName;
	}

	/**
	 * Getter for property "target".
	 * <p>
	 * Same as {@link #getImplementation()} except that this method will not force initialization.
	 *
	 * @return Value for property "target".
	 */
	protected final Object getTarget() {
		return target;

View on GitHub (pinned to fad1729dce)

Solutions

1. Resolve the entity name while a Session is available.
2. Avoid calling getEntityName on detached proxies.

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/5d773e4ed1b6f5a9. Report an issue: GitHub.