{code:java}@Entity
@Table(name = "ENTITY_A")
public class EntityA {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "ID")
Integer id;
@Column(name = "FOO")
Integer foo;
@JoinColumn(name = "CURRENT_ENTITY_B")
@ManyToOne
EntityB currentEntityB;
// not needed for bug report
// @OneToMany(mappedBy = "entityA")
// List<EntityB> listOfEntitiesB = new ArrayList<>();
}
@Entity
@Table(name = "ENTITY_B")
public class EntityB {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "ID")
Integer id;
@JoinColumn(name = "ENTITY_A")
@ManyToOne
EntityA entityA;
}{code}
{code:java} @Override
protected void configure(Configuration configuration) {
super.configure(configuration);
configuration.setProperty(AvailableSettings.SHOW_SQL, Boolean.TRUE.toString());
configuration.setProperty(AvailableSettings.FORMAT_SQL, Boolean.TRUE.toString());
configuration.setProperty(AvailableSettings.DEFAULT_BATCH_FETCH_SIZE, "10");
configuration.setProperty(HibernateHints.HINT_FLUSH_MODE, FlushMode.COMMIT.name());
}
@Test
public void hhhXXXXTest() throws Exception {
Integer currentBId;
try (Session s = openSession()) {
Transaction tx = s.beginTransaction();
EntityA entityA1 = new EntityA();
EntityB entityB1 = new EntityB();
entityB1.entityA = entityA1;
entityA1.currentEntityB = entityB1;
s.persist(entityA1);
s.persist(entityB1);
s.flush();
entityA1.foo = 123;
EntityB entityB2 = new EntityB();
entityB2.entityA = entityA1;
entityA1.currentEntityB = entityB2;
s.persist(entityB2);
currentBId = entityB2.id;
List<EntityA> entitiesA = s.createQuery("select a from EntityA a", EntityA.class).getResultList();
assertThat(entitiesA).hasSize(1);
tx.commit();
}
try (Session s = openSession()) {
List<EntityA> entitiesA = s.createQuery("select a from EntityA a", EntityA.class).getResultList();
assertThat(entitiesA).hasSize(1);
assertThat(entitiesA.get(0).foo).isEqualTo(123);
assertThat(entitiesA.get(0).currentEntityB.id).isEqualTo(currentBId);
}
}{code}
{noformat}org.opentest4j.AssertionFailedError:
Expecting:
<1>
to be equal to:
<2>
but was not.
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
at org.hibernate.bugs.ORMUnitTestCase.hhhXXXXTest(ORMUnitTestCase.java:98)
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}
of course, disabling batch fetch or switching to default flush mode would avoid the issue.
The problem happens because the first query loads the {{EntityA.currentEntityB}} in a batch load which will use {{EntityB.entityA}} to override the parentInstance property.
Failing test scenario to be attached and also available at [https://github.com/ratoaq2/HHH-16575|https://github.com/ratoaq2/HHH-16575|smart-link] |
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