Yoann Rodière ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiY2IwMDUyOWE2... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16108?atlOrigin=eyJpIjoiY2IwMD... ) HHH-16108 ( https://hibernate.atlassian.net/browse/HHH-16108?atlOrigin=eyJpIjoiY2IwMD... ) NullPointerException when flushing a (simple) entity update for models with bytecode enhancement and multiple one-to-one associations (some lazy) ( https://hibernate.atlassian.net/browse/HHH-16108?atlOrigin=eyJpIjoiY2IwMD... ) Issue Type: Bug Assignee: Unassigned Components: bytecode-enhancement, hibernate-core Created: 26/Jan/2023 06:05 AM Fix Versions: 6.2.0 Priority: Major Reporter: Yoann Rodière ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Fails on ORM 6.2, but not on 6.1. I’ll add a reproducer in the comments. With a model like this (cannot be simpler, unfortunately): @Entity(name = "entitya" ) public static class EntityA { @Id private Integer id; @OneToOne private EntityA selfAssociation; @OneToOne(mappedBy = "selfAssociation" ) private EntityA mappedSelfAssociation; @OneToOne(mappedBy = "association1" , fetch = FetchType.LAZY) private EntityB mappedAssociation1; @OneToOne(mappedBy = "association2" , fetch = FetchType.LAZY) private EntityB mappedAssociation2; protected EntityA() { } public EntityA( Integer id) { this.id = id; } public Integer getId() { return id; } public void setId( Integer id) { this.id = id; } public EntityA getSelfAssociation() { return selfAssociation; } public void setSelfAssociation(EntityA selfAssociation) { this.selfAssociation = selfAssociation; } public EntityA getMappedSelfAssociation() { return mappedSelfAssociation; } public void setMappedSelfAssociation(EntityA mappedSelfAssociation) { this.mappedSelfAssociation = mappedSelfAssociation; } public EntityB getMappedAssociation1() { return mappedAssociation1; } public void setMappedAssociation1(EntityB mappedAssociation1) { this.mappedAssociation1 = mappedAssociation1; } public EntityB getMappedAssociation2() { return mappedAssociation2; } public void setMappedAssociation2(EntityB mappedAssociation2) { this.mappedAssociation2 = mappedAssociation2; } } @Entity(name = "entityb" ) public static class EntityB { @Id private Integer id; @OneToOne private EntityA association1; @OneToOne private EntityA association2; protected EntityB() { } public EntityB( Integer id) { this.id = id; } public Integer getId() { return id; } public void setId( Integer id) { this.id = id; } public EntityA getAssociation1() { return association1; } public void setAssociation1(EntityA association1) { this.association1 = association1; } public EntityA getAssociation2() { return association2; } public void setAssociation2(EntityA association2) { this.association2 = association2; } } This will fail: inTransaction( s -> { EntityA entityA = s.get( EntityA.class, 1 ); EntityB entityB = new EntityB( 2 ); entityA.setMappedAssociation1( entityB ); entityB.setAssociation1( entityA ); s.persist( entityB ); } ); With the following exception: java.lang.NullPointerException: Cannot invoke "org.hibernate.metamodel.mapping.SelectableMapping.isFormula()" because "selectable" is null at org.hibernate.persister.entity.mutation.UpdateCoordinatorStandard.processSet(UpdateCoordinatorStandard.java:665) at org.hibernate.persister.entity.mutation.UpdateCoordinatorStandard.processAttribute(UpdateCoordinatorStandard.java:640) at org.hibernate.persister.entity.mutation.UpdateCoordinatorStandard.analyzeUpdateValues(UpdateCoordinatorStandard.java:600) at org.hibernate.persister.entity.mutation.UpdateCoordinatorStandard.performUpdate(UpdateCoordinatorStandard.java:256) at org.hibernate.persister.entity.mutation.UpdateCoordinatorStandard.coordinateUpdate(UpdateCoordinatorStandard.java:203) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2766) at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:165) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:616) at org.hibernate.engine.spi.ActionQueue.lambda$executeActions$1(ActionQueue.java:487) at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:484) at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:358) at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39) at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:127) at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1412) at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:485) at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:2277) at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:1942) at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:426) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:169) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:267) at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101) at org.hibernate.testing.transaction.TransactionUtil2.inTransaction(TransactionUtil2.java:128) at org.hibernate.testing.transaction.TransactionUtil2.lambda$inTransaction$0(TransactionUtil2.java:76) at org.hibernate.testing.transaction.TransactionUtil2.inSession(TransactionUtil2.java:35) at org.hibernate.testing.transaction.TransactionUtil2.inTransaction(TransactionUtil2.java:74) at org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase.inTransaction(BaseNonConfigCoreFunctionalTestCase.java:590) ( https://hibernate.atlassian.net/browse/HHH-16108#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16108#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! 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