Given a base entity

this test case

leads to

java.lang.IllegalArgumentException: Can not set java.util.UUID field org.example.entity.catalog.CatalogValueId.uuid to org.hibernate.engine.spi.CollectionKey

Reproducer:

simply build using:

Full stack trace:

Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.331 sec <<< FAILURE!
metadataBug(org.hibernate.bugs.HibernateReproducerTest) Time elapsed: 1.258 sec <<< ERROR!
org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.util.UUID org.example.entity.catalog.CatalogValueId.uuid] by reflection for persistent property [org.example.entity.catalog.CatalogValueId#uuid] : CollectionKey[org.example.entity.catalog.CatalogValue.metadata#component[uuid]{uuid=00000001-0000-0001-0000-000000000000}]
at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:50)
at org.hibernate.metamodel.mapping.internal.AbstractEmbeddableMapping.getValues(AbstractEmbeddableMapping.java:99)
at org.hibernate.type.ComponentType.getPropertyValues(ComponentType.java:447)
at org.hibernate.type.ComponentType.disassemble(ComponentType.java:666)
at org.hibernate.cache.internal.DefaultCacheKeysFactory.staticCreateCollectionKey(DefaultCacheKeysFactory.java:50)
at org.hibernate.cache.internal.DefaultCacheKeysFactory.createCollectionKey(DefaultCacheKeysFactory.java:103)
at org.hibernate.cache.spi.support.AbstractCollectionDataAccess.generateCacheKey(AbstractCollectionDataAccess.java:38)
at org.hibernate.sql.results.internal.ResultsHelper.addCollectionToCache(ResultsHelper.java:285)
at org.hibernate.sql.results.internal.ResultsHelper.finalizeCollectionLoading(ResultsHelper.java:203)
at org.hibernate.loader.ast.internal.AbstractCollectionBatchLoader.finishInitializingKey(AbstractCollectionBatchLoader.java:86)
at org.hibernate.loader.ast.internal.CollectionBatchLoaderArrayParam.loadEmbeddable(CollectionBatchLoaderArrayParam.java:155)
at org.hibernate.loader.ast.internal.CollectionBatchLoaderArrayParam.load(CollectionBatchLoaderArrayParam.java:109)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:680)
at org.hibernate.event.internal.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:75)
at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:127)
at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:1702)
at org.hibernate.collection.spi.AbstractPersistentCollection.lambda$initialize$3(AbstractPersistentCollection.java:617)
at org.hibernate.collection.spi.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:265)
at org.hibernate.collection.spi.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:615)
at org.hibernate.collection.spi.AbstractPersistentCollection.read(AbstractPersistentCollection.java:136)
at org.hibernate.collection.spi.AbstractPersistentCollection.lambda$readSize$0(AbstractPersistentCollection.java:163)
at org.hibernate.collection.spi.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:265)
at org.hibernate.collection.spi.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:148)
at org.hibernate.collection.spi.PersistentMap.size(PersistentMap.java:130)
at org.hibernate.bugs.HibernateReproducerTest.metadataBug(HibernateReproducerTest.java:34)
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.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$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$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: java.lang.IllegalArgumentException: Can not set java.util.UUID field org.example.entity.catalog.CatalogValueId.uuid to org.hibernate.engine.spi.CollectionKey
at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)
at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58)
at java.base/jdk.internal.reflect.UnsafeObjectFieldAccessorImpl.get(UnsafeObjectFieldAccessorImpl.java:36)
at java.base/java.lang.reflect.Field.get(Field.java:425)
at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:46)
... 58 more

Results :

Tests in error:
metadataBug(org.hibernate.bugs.HibernateReproducerTest): Error accessing field [private java.util.UUID org.example.entity.catalog.CatalogValueId.uuid] by reflection for persistent property [org.example.entity.catalog.CatalogValueId#uuid] : CollectionKey[org.example.entity.catalog.CatalogValue.metadata#component[uuid]{uuid=00000001-0000-0001-0000-000000000000}]