Bert Roos ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZTI2NmJjMzM0... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16912?atlOrigin=eyJpIjoiZTI2Nm... ) HHH-16912 ( https://hibernate.atlassian.net/browse/HHH-16912?atlOrigin=eyJpIjoiZTI2Nm... ) Hibernate 6.2 breaks backward compatibility ( https://hibernate.atlassian.net/browse/HHH-16912?atlOrigin=eyJpIjoiZTI2Nm... ) Issue Type: Bug Affects Versions: 6.2.0, 6.2.1, 6.2.2, 6.2.3, 6.2.4, 6.2.5, 6.2.6 Assignee: Unassigned Components: hibernate-core Created: 08/Jul/2023 07:57 AM Environment: Hibernate 6.2.6 on Java 17 Priority: Blocker Reporter: Bert Roos ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) As part of https://hibernate.atlassian.net/browse/HHH-15782 , the generator hierarchy is updated. This lead to the deprecation of org.hibernate.mapping.KeyValue.createIdentifierGenerator. To retain backward compatibility, this method was kept in the code, calling the new method ( createGenerator ) and casting the result to IdentifierGenerator. That however does not work, as the new method returns an instance of type IdentityGenerator , which cannot be cast to IdentifierGenerator. This makes Liquibase Hibernate fail with the following error: [2023-07-08 16:54:17] SEVERE [liquibase.integration] class org.hibernate.id.IdentityGenerator cannot be cast to class org.hibernate.id.IdentifierGenerator (org.hibernate.id.IdentityGenerator and org.hibernate.id.IdentifierGenerator are in unnamed module of loader 'app') liquibase.exception.CommandExecutionException: java.lang.ClassCastException: class org.hibernate.id.IdentityGenerator cannot be cast to class org.hibernate.id.IdentifierGenerator (org.hibernate.id.IdentityGenerator and org.hibernate.id.IdentifierGenerator are in unnamed module of loader 'app') at liquibase.command.CommandScope.execute(CommandScope.java:236) at liquibase.integration.commandline.CommandRunner.call(CommandRunner.java:55) at liquibase.integration.commandline.CommandRunner.call(CommandRunner.java:24) at picocli.CommandLine.executeUserObject(CommandLine.java:2041) at picocli.CommandLine.access$1500(CommandLine.java:148) at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2461) at picocli.CommandLine$RunLast.handle(CommandLine.java:2453) at picocli.CommandLine$RunLast.handle(CommandLine.java:2415) at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2273) at picocli.CommandLine$RunLast.execute(CommandLine.java:2417) at picocli.CommandLine.execute(CommandLine.java:2170) at liquibase.integration.commandline.LiquibaseCommandLine.lambda$execute$2(LiquibaseCommandLine.java:381) at liquibase.Scope.child(Scope.java:206) at liquibase.Scope.child(Scope.java:182) at liquibase.integration.commandline.LiquibaseCommandLine.lambda$execute$3(LiquibaseCommandLine.java:356) at liquibase.Scope.child(Scope.java:206) at liquibase.Scope.child(Scope.java:182) at liquibase.integration.commandline.LiquibaseCommandLine.execute(LiquibaseCommandLine.java:354) at liquibase.integration.commandline.LiquibaseCommandLine.main(LiquibaseCommandLine.java:94) Caused by: java.lang.ClassCastException: class org.hibernate.id.IdentityGenerator cannot be cast to class org.hibernate.id.IdentifierGenerator (org.hibernate.id.IdentityGenerator and org.hibernate.id.IdentifierGenerator are in unnamed module of loader 'app') at org.hibernate.mapping.KeyValue.createIdentifierGenerator(KeyValue.java:58) at liquibase.ext.hibernate.snapshot.TableSnapshotGenerator.addTo(TableSnapshotGenerator.java:84) at liquibase.ext.hibernate.snapshot.HibernateSnapshotGenerator.snapshot(HibernateSnapshotGenerator.java:82) at liquibase.snapshot.SnapshotGeneratorChain.snapshot(SnapshotGeneratorChain.java:49) at liquibase.ext.hibernate.snapshot.HibernateSnapshotGenerator.snapshot(HibernateSnapshotGenerator.java:74) at liquibase.snapshot.SnapshotGeneratorChain.snapshot(SnapshotGeneratorChain.java:49) at liquibase.snapshot.DatabaseSnapshot.include(DatabaseSnapshot.java:313) at liquibase.snapshot.DatabaseSnapshot.init(DatabaseSnapshot.java:106) at liquibase.snapshot.DatabaseSnapshot.<init>(DatabaseSnapshot.java:59) at liquibase.snapshot.JdbcDatabaseSnapshot.<init>(JdbcDatabaseSnapshot.java:34) at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot(SnapshotGeneratorFactory.java:214) at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot(SnapshotGeneratorFactory.java:187) at liquibase.command.core.DiffCommandStep.generateDatabaseShapshot(DiffCommandStep.java:205) at liquibase.command.core.DiffCommandStep.createReferenceSnapshot(DiffCommandStep.java:192) at liquibase.command.core.DiffCommandStep.createDiffResult(DiffCommandStep.java:113) at liquibase.command.core.DiffCommandStep.run(DiffCommandStep.java:89) at liquibase.command.CommandScope.execute(CommandScope.java:213) ... 18 more See related Liquibase ticket: liquibase/liquibase-hibernate#495 ( https://github.com/liquibase/liquibase-hibernate/issues/495 ) ( https://hibernate.atlassian.net/browse/HHH-16912#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16912#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! 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