Thomas Heigl ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMzRhMThhNTI2... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-15644?atlOrigin=eyJpIjoiMzRhMT... ) HHH-15644 ( https://hibernate.atlassian.net/browse/HHH-15644?atlOrigin=eyJpIjoiMzRhMT... ) ClassCastException for EmbeddableFetchInitializer since 6.1.1 ( https://hibernate.atlassian.net/browse/HHH-15644?atlOrigin=eyJpIjoiMzRhMT... ) Change By: Thomas Heigl ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) After upgrading from 6.1. 4 0 to 6.1. 5 1 many of our tests fail with the following ClassCastException: {noformat}java.lang.ClassCastException: class org.hibernate.sql.results.graph.embeddable.internal.EmbeddableFetchInitializer cannot be cast to class org.hibernate.sql.results.graph.entity.AbstractEntityInitializer (org.hibernate.sql.results.graph.embeddable.internal.EmbeddableFetchInitializer and org.hibernate.sql.results.graph.entity.AbstractEntityInitializer are in unnamed module of loader 'app') at org.hibernate.sql.results.graph.entity.internal.BatchEntitySelectFetchInitializer.endLoading(BatchEntitySelectFetchInitializer.java:225) at org.hibernate.sql.results.internal.StandardRowReader.finishUp(StandardRowReader.java:161) at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:168) at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:32) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.doExecuteQuery(JdbcSelectExecutorStandardImpl.java:443) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.executeQuery(JdbcSelectExecutorStandardImpl.java:166) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.list(JdbcSelectExecutorStandardImpl.java:91) at org.hibernate.sql.exec.spi.JdbcSelectExecutor.list(JdbcSelectExecutor.java:31) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.lambda$new$0(ConcreteSqmSelectQueryPlan.java:102) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.withCacheableSqmInterpretation(ConcreteSqmSelectQueryPlan.java:305) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.performList(ConcreteSqmSelectQueryPlan.java:246) at org.hibernate.query.sqm.internal.QuerySqmImpl.doList(QuerySqmImpl.java:546) at org.hibernate.query.spi.AbstractSelectionQuery.list(AbstractSelectionQuery.java:363) at org.hibernate.query.sqm.internal.QuerySqmImpl.list(QuerySqmImpl.java:1032){noformat} I can try to create a reproducer in the next days, but I think the stracktrace should provide enough information about the problem. ( https://hibernate.atlassian.net/browse/HHH-15644#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15644#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100209- sha1:d23b292 )