hibernate/hibernate-orm · error · LazyInitializationException

Could not initialize proxy [{}#{}] - session was closed or d

Error message

Could not initialize proxy [{}#{}] - session was closed or disconnected

What it means

Error "Could not initialize proxy [{}#{}] - session was closed or disconnected" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/proxy/AbstractLazyInitializer.java:262

						session.close();
					}
					catch (Exception e) {
						CORE_LOGGER.unableToCLoseTempSession();
					}
				}
			}
			catch (Exception e) {
				throw new LazyInitializationException( "Could not initialize proxy ["
						+ entityName + "#" + id + "]: " + e.getMessage() );
			}
		}
		else if ( session.isOpenOrWaitingForAutoClose() && session.isConnected() ) {
			target = immediateLoad( session );
			initialized = true;
			checkTargetState( session );
		}
		else {
			throw new LazyInitializationException( "Could not initialize proxy ["
					+ entityName + "#" + id + "] - session was closed or disconnected" );
		}
	}

	private Object immediateLoad(SharedSessionContractImplementor session) {
		if ( temporalIdentifier != null ) {
			final var influencers = session.getLoadQueryInfluencers();
			final Object previous = influencers.getTemporalIdentifier();
			influencers.setTemporalIdentifier( temporalIdentifier );
			try {
				return session.immediateLoad( entityName, id );
			}
			finally {
				influencers.setTemporalIdentifier( previous );
			}
		}
		else {
			return session.immediateLoad( entityName, id );

View on GitHub (pinned to fad1729dce)

Solutions

1. Initialize the proxy while the session is open and connected.
2. Catch LazyInitializationException and reload within an active session.

When it happens

Trigger: A lazy proxy is accessed outside the lifecycle of its owning Hibernate Session.

Common situations: LazyInitializationException-style failures when rendering entities after the transaction/Session closed, common in web views and serialization.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/e109fba45c9ff5cd. Report an issue: GitHub.