Spring boot 3.4.1: java.util.NoSuchElementException in spring-orm 6.2.1

[Gunthervg]

Hello,

After upgrading from spring-boot-starter-parent 3.3.7 to 3.4.1 we get the following stacktrace when trying to start the application.
Any idea what the cause could be?

09:35:25,265 | ERROR | main | org.springframework.boot.SpringApplication | Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is java.util.NoSuchElementException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1808) ~[spring-beans-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:601) ~[spring-beans-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:523) ~[spring-beans-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:336) ~[spring-beans-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:289) ~[spring-beans-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:334) ~[spring-beans-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:204) ~[spring-beans-6.2.1.jar:6.2.1]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:970) ~[spring-context-6.2.1.jar:6.2.1]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:627) ~[spring-context-6.2.1.jar:6.2.1]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.4.1.jar:3.4.1]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) [spring-boot-3.4.1.jar:3.4.1]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:439) [spring-boot-3.4.1.jar:3.4.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:318) [spring-boot-3.4.1.jar:3.4.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361) [spring-boot-3.4.1.jar:3.4.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1350) [spring-boot-3.4.1.jar:3.4.1]
at be.careconnect.nurse.Application.main(Application.java:63) [classes/:?]
Caused by: jakarta.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is java.util.NoSuchElementException
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:431) ~[spring-orm-6.2.1.jar:6.2.1]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:400) ~[spring-orm-6.2.1.jar:6.2.1]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:366) ~[spring-orm-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855) ~[spring-beans-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-6.2.1.jar:6.2.1]
... 15 more
Caused by: java.util.NoSuchElementException
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1052) ~[?:?]
at org.hibernate.metamodel.internal.AttributeFactory.resolveMappedSuperclassMember(AttributeFactory.java:784) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.metamodel.internal.AttributeFactory.lambda$static$2(AttributeFactory.java:746) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.metamodel.internal.AttributeFactory.determineAttributeMetadata(AttributeFactory.java:460) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.metamodel.internal.AttributeFactory.buildAttribute(AttributeFactory.java:122) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.metamodel.internal.AttributeFactory.buildAttribute(AttributeFactory.java:108) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.metamodel.internal.MetadataContext.buildAttribute(MetadataContext.java:287) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.metamodel.internal.MetadataContext.wrapUp(MetadataContext.java:378) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.metamodel.model.domain.internal.JpaMetamodelImpl.processJpa(JpaMetamodelImpl.java:618) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.metamodel.model.domain.internal.MappingMetamodelImpl.finishInitialization(MappingMetamodelImpl.java:216) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.internal.SessionFactoryImpl.initializeMappingModel(SessionFactoryImpl.java:373) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.internal.SessionFactoryImpl.(SessionFactoryImpl.java:302) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:463) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1506) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:66) ~[spring-orm-6.2.1.jar:6.2.1]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:390) ~[spring-orm-6.2.1.jar:6.2.1]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:419) ~[spring-orm-6.2.1.jar:6.2.1]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:400) ~[spring-orm-6.2.1.jar:6.2.1]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:366) ~[spring-orm-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855) ~[spring-beans-6.2.1.jar:6.2.1]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-6.2.1.jar:6.2.1]
... 15 more

[snicoll]

Hibernate is failing to start, see this portion of the stacktrace you've shared:

Caused by: java.util.NoSuchElementException
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1052) ~[?:?]
at org.hibernate.metamodel.internal.AttributeFactory.resolveMappedSuperclassMember(AttributeFactory.java:784) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]

This needs to be reported against the Hibernate project.

[Gunthervg]

@snicoll seems the stacktrace is indeed open for discussion.
Think the root cause was logged by Hibernate (info) before:

Encountered a MappedSuperclass [xxx.SomeClass] not used in any entity hierarchy
This made Hibernate fail to start up:

at org.hibernate.metamodel.internal.AttributeFactory.resolveMappedSuperclassMember(AttributeFactory.java:784) ~[hibernate-core-6.6.4.Final.jar:6.6.4.Final]