Jones ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZTJlMGVkOTEw... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16343?atlOrigin=eyJpIjoiZTJlMG... ) HHH-16343 ( https://hibernate.atlassian.net/browse/HHH-16343?atlOrigin=eyJpIjoiZTJlMG... ) Batch Fetch Size + PreLoadEventListener + Polymorphic Entity with cache enabled could lead to IllegalStateException: Illegal pop() with non-matching JdbcValuesSourceProcessingState ( https://hibernate.atlassian.net/browse/HHH-16343?atlOrigin=eyJpIjoiZTJlMG... ) Change By: Jones ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Given: * Batch fetch size * Polymorphic entity with cache and relationships described below * PreLoadEventListener which uses Hibernate.getClass(event.getEntity()) When * Executing a simple HQL to list entities Then * IllegalStateException: Illegal pop() with non-matching JdbcValuesSourceProcessingState happens {code:java}@Entity @Table(name = "ENTITY_A") public class EntityA { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "ID") Integer id; @JoinColumn(name = "ENTITY_B", foreignKey = @ForeignKey(name = "FK_A_TO_B")) @ManyToOne @Fetch(FetchMode.SELECT) EntityB entityB; }{code} {code:java}@Entity @Table(name = "ENTITY_B") @DiscriminatorColumn(name = "DISC_COL", discriminatorType = DiscriminatorType.INTEGER) @DiscriminatorValue("0") @Cache(usage = CacheConcurrencyStrategy.READ_WRITE) public class ParentEntityB { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "ID") Integer id; }{code} {code:java}@Entity @DiscriminatorValue("1") @Cache(usage = CacheConcurrencyStrategy.READ_WRITE) public class EntityB extends ParentEntityB { @JoinColumn(name = "ENTITY_C", foreignKey = @ForeignKey(name = "FK_B_TO_C")) @ManyToOne @Fetch(FetchMode.SELECT) EntityC entityC; }{code} {code:java}@Entity @Table(name = "ENTITY_C") public class EntityC { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "ID") Integer id; }{code} {code:java}public class MyPreLoadEventListener implements PreLoadEventListener { @Override public void onPreLoad(PreLoadEvent event) { Hibernate.getClass(event.getEntity()); } }{code} {code:java}public class MyIntegrator implements Integrator { @Override public void integrate(Metadata metadata, BootstrapContext bootstrapContext, SessionFactoryImplementor sessionFactory) { ServiceRegistry serviceRegistry = sessionFactory.getServiceRegistry(); EventListenerRegistry listenerRegistry = serviceRegistry.getService(EventListenerRegistry.class); listenerRegistry.getEventListenerGroup(EventType.PRE_LOAD).appendListener(new MyPreLoadEventListener()); } @Override public void disintegrate(SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) { // empty } }{code} {code:java} @Test public void hhhXXXXTest() throws Exception { try (Session s = openSession()) { Transaction tx = s.beginTransaction(); EntityA entityA1 = new EntityA(); EntityB entityB1 = new EntityB(); EntityC entityC1 = new EntityC(); entityB1.entityC = entityC1; entityA1.entityB = entityB1; s.persist(entityC1); s.persist(entityB1); s.persist(entityA1); tx.commit(); } try (Session s = openSession()) { Transaction tx = s.beginTransaction(); String hql = "select e from org.hibernate.bugs.EntityA e"; Query<EntityA> query = s.createQuery(hql, EntityA.class); List<EntityA> actual = query.list(); assertThat(actual).hasSize(1); tx.rollback(); } }{code} {noformat}java.lang.IllegalStateException: Illegal pop() with non-matching JdbcValuesSourceProcessingState at org.hibernate.sql.results.spi.LoadContexts.deregister(LoadContexts.java:46) at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:209) at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:33) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.doExecuteQuery(JdbcSelectExecutorStandardImpl.java:362) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.executeQuery(JdbcSelectExecutorStandardImpl.java:168) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.list(JdbcSelectExecutorStandardImpl.java:93) at org.hibernate.sql.exec.spi.JdbcSelectExecutor.list(JdbcSelectExecutor.java:31) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.lambda$new$0(ConcreteSqmSelectQueryPlan.java:109) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.withCacheableSqmInterpretation(ConcreteSqmSelectQueryPlan.java:302) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.performList(ConcreteSqmSelectQueryPlan.java:243) at org.hibernate.query.sqm.internal.QuerySqmImpl.doList(QuerySqmImpl.java:521) at org.hibernate.query.spi.AbstractSelectionQuery.list(AbstractSelectionQuery.java:367) at org.hibernate.query.sqm.internal.QuerySqmImpl.list(QuerySqmImpl.java:1084) at org.hibernate.bugs.ORMUnitTestCase.hhhXXXXTest(ORMUnitTestCase.java:83) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56) at org.hibernate.testing.junit4.ExtendedFrameworkMethod.invokeExplosively(ExtendedFrameworkMethod.java:45) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.lang.Thread.run(Thread.java:833) {noformat} The failing test scenario to be attached soon and also available at [https://github.com/ratoaq2/HHH-16343|https://github.com/ratoaq2/HHH-16343...] ( https://hibernate.atlassian.net/browse/HHH-16343#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16343#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! 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