HHH-10608 - Avoid exception from Hibernate.initialize when lazy_no_tr…

…ansaction is enabled

hibernate-core/src/main/java/org/hibernate/collection/internal/AbstractPersistentCollection.java

@@ -736,13 +736,7 @@ public final void forceInitialization() throws HibernateException {
 			if ( initializing ) {
 				throw new AssertionFailure( "force initialize loading collection" );
 			}
-			if ( session == null ) {
-				throw new HibernateException( "collection is not associated with any session" );
-			}
-			if ( !session.isConnected() ) {
-				throw new HibernateException( "disconnected session" );
-			}
-			session.initializeCollection( this, false );
+			initialize( false );
 		}
 	}
 

hibernate-core/src/test/java/org/hibernate/test/ondemandload/cache/CacheLazyLoadNoTransTest.java

@@ -21,6 +21,7 @@
 import javax.persistence.OneToMany;
 import javax.persistence.Table;
 
+import org.hibernate.Hibernate;
 import org.hibernate.Session;
 import org.hibernate.annotations.Cache;
 import org.hibernate.annotations.CacheConcurrencyStrategy;
@@ -53,6 +54,21 @@ protected void addSettings(Map settings) {
 		settings.put( Environment.CACHE_PROVIDER_CONFIG, "true" );
 	}
 
+	@Test
+	public void hibernateInitialize() {
+		Customer customer = new Customer();
+		Item item1 = new Item( customer );
+		Item item2 = new Item( customer );
+		customer.boughtItems.add( item1 );
+		customer.boughtItems.add( item2 );
+		persist( customer );
+
+		customer = find( Customer.class, customer.id );
+		assertFalse( Hibernate.isInitialized( customer.boughtItems ) );
+		Hibernate.initialize( customer.boughtItems );
+		assertTrue( Hibernate.isInitialized( customer.boughtItems ) );
+	}
+
 	@Test
 	public void testOneToMany() {
 		Customer customer = new Customer();