William Rosenquist Burns ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5a7b38f... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiYjU5MGQ2MjYy... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16033?atlOrigin=eyJpIjoiYjU5MG... ) HHH-16033 ( https://hibernate.atlassian.net/browse/HHH-16033?atlOrigin=eyJpIjoiYjU5MG... ) Many-to-Many inverse mapping referencing the same class uses pk instead of fk field for removal ( https://hibernate.atlassian.net/browse/HHH-16033?atlOrigin=eyJpIjoiYjU5MG... ) Change By: William Rosenquist Burns ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5a7b38f... ) While updating Infinispan 2LC to use Hibernate 6.2.0 from 6.0.2 we found a regression with how many to many mappings do a removal. It seems to be trying to use the primary key identifier instead of the foreign key field. This is a problem for a test as the primary key is a Long and the foreign key is a String. This causes a ClassCastException when it tries to remove any many-to-many mappings that may exist. {noformat}        <bag name="bagOfItems" inverse="true" table="items_otheritems"> <key column="other_item_id"/> <many-to-many class="Item" property-ref="name" column="item_name" /> </bag>{noformat} This mapping is the underlying cause. The test just creates an entity in one session, then in a second loads it and removes it, quite simple. PR will be attached after. The stack trace is as follows from the [PR|https://github.com/hibernate/hibernate-orm/pull/5945] {noformat}java.lang.ClassCastException: class java.lang.Long cannot be cast to class java.lang.String (java.lang.Long and java.lang.String are in module java.base of loader 'bootstrap') at org.hibernate.type.descriptor.java.StringJavaType.unwrap(StringJavaType.java:27) at org.hibernate.type.descriptor.jdbc.VarcharJdbcType$1.doBind(VarcharJdbcType.java:110) at org.hibernate.type.descriptor.jdbc.BasicBinder.bind(BasicBinder.java:61) at org.hibernate.engine.jdbc.mutation.internal.JdbcValueBindingsImpl.lambda$beforeStatement$0(JdbcValueBindingsImpl.java:87) at java.base/java.lang.Iterable.forEach(Iterable.java:75) at org.hibernate.engine.jdbc.mutation.spi.BindingGroup.forEachBinding(BindingGroup.java:51) at org.hibernate.engine.jdbc.mutation.internal.JdbcValueBindingsImpl.beforeStatement(JdbcValueBindingsImpl.java:85) at org.hibernate.engine.jdbc.mutation.internal.AbstractMutationExecutor.performNonBatchedMutation(AbstractMutationExecutor.java:93) at org.hibernate.engine.jdbc.mutation.internal.MutationExecutorSingleNonBatched.performNonBatchedOperations(MutationExecutorSingleNonBatched.java:40) at org.hibernate.engine.jdbc.mutation.internal.AbstractMutationExecutor.execute(AbstractMutationExecutor.java:43) at org.hibernate.persister.collection.mutation.RemoveCoordinatorStandard.deleteAllRows(RemoveCoordinatorStandard.java:113) at org.hibernate.persister.collection.AbstractCollectionPersister.remove(AbstractCollectionPersister.java:1124) at org.hibernate.action.internal.CollectionRemoveAction.execute(CollectionRemoveAction.java:112) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:616) at org.hibernate.engine.spi.ActionQueue.lambda$executeActions$1(ActionQueue.java:487) at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:484) at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:329) at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:58) at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:107) at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1403) at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:476) at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:2269) at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:1933) at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:426) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:169) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:267) at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101) at org.hibernate.testing.orm.transaction.TransactionUtil.wrapInTransaction(TransactionUtil.java:54) at org.hibernate.testing.orm.transaction.TransactionUtil.inTransaction(TransactionUtil.java:24) at org.hibernate.testing.orm.junit.SessionFactoryExtension$SessionFactoryScopeImpl.inTransaction(SessionFactoryExtension.java:375) at org.hibernate.testing.orm.junit.SessionFactoryExtension$SessionFactoryScopeImpl.inTransaction(SessionFactoryExtension.java:352) at org.hibernate.orm.test.manytomanyassociationclass.nestedreference.ItemSelfReferenceTest.testSimpleCreateAndDelete(ItemSelfReferenceTest.java:31){noformat} ( https://hibernate.atlassian.net/browse/HHH-16033#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16033#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! 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