ortwin.escher ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5e89d19... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZjIxNTNhNzUw... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-17001?atlOrigin=eyJpIjoiZjIxNT... ) HHH-17001 ( https://hibernate.atlassian.net/browse/HHH-17001?atlOrigin=eyJpIjoiZjIxNT... ) An "on"-clause referencing the affected join node causes a StackOverflowException ( https://hibernate.atlassian.net/browse/HHH-17001?atlOrigin=eyJpIjoiZjIxNT... ) Change By: ortwin.escher ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5e89d19... ) When referencing a join node in an “on”-clause the lookup of the join node causes a StackOverflowError. This worked in Hibernate 5 and blocks us from migrating to Hibernate 6. Code example: {noformat}final Child someChildToCompareTo = new Child(); entityManager.persist(someChildToCompareTo); final CriteriaBuilder cb = entityManager.getCriteriaBuilder(); final CriteriaQuery<Parent> cq = cb.createQuery(Parent.class); final Root<Parent> root = cq.from(Parent.class); final SetJoin<Parent, Child> childrenJoin = root.join(Parent_.children); // This will cause a StackOverflowError: childrenJoin.on(cb.equal(childrenJoin, someChildToCompareTo)); entityManager.createQuery(cq).getResultList();{noformat} A reproducer project is attached. I adapted the reproducer of [https://hibernate.atlassian.net/browse/HHH-16968|https://hibernate.atlass...] to demonstrate the problem. Example Stacktrace excerpt: {code:none} at org.hibernate.query.sqm.SemanticQueryWalker.visitSetJoin(SemanticQueryWalker.java:211) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.domain.SqmSetJoin.accept(SqmSetJoin.java:85) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.jpa.ParameterCollector.lambda$visitComparisonPredicate$14(ParameterCollector.java:272) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.jpa.ParameterCollector.withTypeInference(ParameterCollector.java:147) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.jpa.ParameterCollector.visitComparisonPredicate(ParameterCollector.java:272) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.predicate.SqmComparisonPredicate.accept(SqmComparisonPredicate.java:104) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.spi.BaseSemanticQueryWalker.visitQualifiedAttributeJoin(BaseSemanticQueryWalker.java:296) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.SemanticQueryWalker.visitSetJoin(SemanticQueryWalker.java:211) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.domain.SqmSetJoin.accept(SqmSetJoin.java:85) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.jpa.ParameterCollector.lambda$visitComparisonPredicate$14(ParameterCollector.java:272) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.jpa.ParameterCollector.withTypeInference(ParameterCollector.java:147) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.jpa.ParameterCollector.visitComparisonPredicate(ParameterCollector.java:272) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.predicate.SqmComparisonPredicate.accept(SqmComparisonPredicate.java:104) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.spi.BaseSemanticQueryWalker.visitQualifiedAttributeJoin(BaseSemanticQueryWalker.java:296) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.SemanticQueryWalker.visitSetJoin(SemanticQueryWalker.java:211) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.domain.SqmSetJoin.accept(SqmSetJoin.java:85) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.jpa.ParameterCollector.lambda$visitComparisonPredicate$14(ParameterCollector.java:272) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.jpa.ParameterCollector.withTypeInference(ParameterCollector.java:147) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.jpa.ParameterCollector.visitComparisonPredicate(ParameterCollector.java:272) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.predicate.SqmComparisonPredicate.accept(SqmComparisonPredicate.java:104) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.spi.BaseSemanticQueryWalker.visitQualifiedAttributeJoin(BaseSemanticQueryWalker.java:296) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.SemanticQueryWalker.visitSetJoin(SemanticQueryWalker.java:211) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1] at org.hibernate.query.sqm.tree.domain.SqmSetJoin.accept(SqmSetJoin.java:85) ~[hibernate-core-6.3.0.CR1.jar:6.3.0.CR1]{code} ( https://hibernate.atlassian.net/browse/HHH-17001#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-17001#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! 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