Harald Wirths ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=712020%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMzkzMTkzN2Fm... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16961?atlOrigin=eyJpIjoiMzkzMT... ) HHH-16961 ( https://hibernate.atlassian.net/browse/HHH-16961?atlOrigin=eyJpIjoiMzkzMT... ) Resolving an embedded id of an entity targeted by a unidirectional @OneToOne assocation not referencing the embedded id fails ( https://hibernate.atlassian.net/browse/HHH-16961?atlOrigin=eyJpIjoiMzkzMT... ) Issue Type: Bug Affects Versions: 5.6.15 Assignee: Unassigned Components: hibernate-core Created: 20/Jul/2023 08:06 AM Environment: Hibernate ORM 5.6.15 (hibernate-test-case-templates/hibernate-orm-5), Java 8 (openjdk version "1.8.0_372"), Linux (openSUSE Leap 15.4), H2 database (version 2.2.220) Priority: Minor Reporter: Harald Wirths ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=712020%... ) Given an embeddable @Embeddable public class Coordinate implements Serializable { private static final long serialVersionUID = 1L; private Integer slot_number; private Integer port_number; // Getters, setters, hashCode and equals are omitted for brevity } and the two entities @Entity public class Port implements Serializable { private static final long serialVersionUID = 1L; @EmbeddedId private Coordinate coordinate; private Integer connection_id; // Getters and setters are omitted for brevity } @Entity public class Device implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue private Integer device_id; @OneToOne @JoinColumn(name = "connection_id" , referencedColumnName = "connection_id" ) private Port port; // Getters and setters are omitted for brevity } selecting device entities ( entityManager.createQuery("select d from Device d").getResultList() ) runs into an exception with the following stacktrace javax.persistence.PersistenceException: org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.Integer org.hibernate.bugs.Coordinate.port_number] by reflection for persistent property [org.hibernate.bugs.Coordinate#port_number] : Port [coordinate=null, connection_id=1] at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1626) at org.hibernate.query.internal.AbstractProducedQuery.getSingleResult(AbstractProducedQuery.java:1665) at org.hibernate.bugs.JPAUnitTestCase.hhh123Test(JPAUnitTestCase.java:68) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) 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.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.runners.ParentRunner$3.evaluate(ParentRunner.java:306) at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63) at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329) at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293) at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306) at org.junit.runners.ParentRunner.run(ParentRunner.java:413) at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189) at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165) at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75) Caused by: org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.Integer org.hibernate.bugs.Coordinate.port_number] by reflection for persistent property [org.hibernate.bugs.Coordinate#port_number] : Port [coordinate=null, connection_id=1] at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:75) at org.hibernate.tuple.component.AbstractComponentTuplizer.getPropertyValue(AbstractComponentTuplizer.java:59) at org.hibernate.type.ComponentType.getPropertyValue(ComponentType.java:419) at org.hibernate.type.ComponentType.getHashCode(ComponentType.java:246) at org.hibernate.engine.spi.EntityUniqueKey.generateHashCode(EntityUniqueKey.java:67) at org.hibernate.engine.spi.EntityUniqueKey.<init>(EntityUniqueKey.java:48) at org.hibernate.type.ManyToOneType.resolve(ManyToOneType.java:288) at org.hibernate.engine.internal.TwoPhaseLoad$EntityResolver.lambda$static$0(TwoPhaseLoad.java:576) at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntityEntryLoadedState(TwoPhaseLoad.java:221) at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:155) at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:126) at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1201) at org.hibernate.loader.Loader.processResultSet(Loader.java:1009) at org.hibernate.loader.Loader.doQuery(Loader.java:967) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:357) at org.hibernate.loader.Loader.doList(Loader.java:2868) at org.hibernate.loader.Loader.doList(Loader.java:2850) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2682) at org.hibernate.loader.Loader.list(Loader.java:2677) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:540) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:400) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:218) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1459) at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1649) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1617) ... 36 more Caused by: java.lang.IllegalArgumentException: Can not set java.lang.Integer field org.hibernate.bugs.Coordinate.port_number to org.hibernate.bugs.Port at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167) at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171) at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58) at sun.reflect.UnsafeObjectFieldAccessorImpl.get(UnsafeObjectFieldAccessorImpl.java:36) at java.lang.reflect.Field.get(Field.java:393) at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:71) ... 60 more` ( https://hibernate.atlassian.net/browse/HHH-16961#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16961#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! 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