hibernate/hibernate-orm · error · SessionException

proxies cannot be fetched by a stateless session

Error message

proxies cannot be fetched by a stateless session

What it means

Error "proxies cannot be fetched by a stateless session" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/internal/StatelessSessionImpl.java:1364

			for ( Object entity : entities ) {
				doRefresh( bestGuessEntityName( entity ), entity, LockMode.NONE );
			}
		}
		catch ( MappingException e ) {
			throw getExceptionConverter().convert( new IllegalArgumentException( e.getMessage(), e ) );
		}
		catch ( RuntimeException e ) {
			throw getExceptionConverter().convert( e );
		}
		finally {
			afterOperation();
		}
	}

	@Override
	public Object immediateLoad(@Nonnull String entityName, @Nonnull Object id) {
		if ( getPersistenceContextInternal().isLoadFinished() ) {
			throw new SessionException( "proxies cannot be fetched by a stateless session" );
		}
		// unless we are still in the process of handling a top-level load
		return get( entityName, id );
	}

	@Override
	public void initializeCollection(@Nonnull PersistentCollection<?> collection, boolean writing) {
		checkOpen();
		final var persistenceContext = getPersistenceContextInternal();
		final var ce = persistenceContext.getCollectionEntry( collection );
		if ( ce == null ) {
			throw new HibernateException( "no entry for collection" );
		}
		if ( !collection.wasInitialized() ) {
			final var loadedPersister = ce.getLoadedPersister();
			final Object loadedKey = ce.getLoadedKey();
			if ( loadedPersister == null ) {
				throw new AssertionFailure( "collection entry has no loaded persister" );

View on GitHub (pinned to fad1729dce)

Solutions

1. Use a regular Session if you need proxy/lazy fetching; stateless sessions do not support proxies.
2. Fetch the entity eagerly via the stateless session API instead of obtaining a proxy.

When it happens

Trigger: Thrown at hibernate-core/src/main/java/org/hibernate/internal/StatelessSessionImpl.java:1364 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/914349144c5ada01. Report an issue: GitHub.