JPA 使用双向 @OneToMany 抛出 java.lang.StackOverflowError

【问题标题】：JPA throws java.lang.StackOverflowError with bidirectional @OneToManyJPA 使用双向 @OneToMany 抛出 java.lang.StackOverflowError
【发布时间】：2021-08-30 10:49:22
【问题描述】：

我有两个实体类如下。 Parachute 是父对象，它有多个 Component 对象。我需要在这里实现双向@OneToMany。

父Parachute.java 班级。

@Entity
@Table(name = "parachute")
@EntityListeners(AuditingEntityListener.class)
public class Parachute {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @OneToMany(mappedBy = "parachute",cascade = CascadeType.ALL, fetch=FetchType.EAGER)
    private List<Component> components = new ArrayList<>();

    public void addComponent(Component component) {
        components.add(component);
        component.setParachute(this);
    }

}

孩子Component.java班级

@Entity
@Table(name = "component")
@EntityListeners(AuditingEntityListener.class)
public class Component {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    @ManyToOne
    @JoinColumn(name = "parachute_id")
    private Parachute parachute;
}

我尝试如下添加降落伞。

Component component1 = new Component();
component1.setSerialNumber("12121999");

Component component2 = new Component();
component2.setSerialNumber("12121910");

Parachute parachute = new Parachute();
parachute.setName("new Para");

parachute.addComponent(component1);
parachute.addComponent(component2)

parachuteRepository.save(parachute);

这给了我一个java.lang.StackOverflowError。我做错了还是有其他方法可以做到这一点？

请参考下面的堆栈跟踪。同一首曲目已重复多次。

    java.lang.StackOverflowError
    at java.lang.StringCoding$StringEncoder.encode(StringCoding.java:304)
    at java.lang.StringCoding.encode(StringCoding.java:344)
    at java.lang.String.getBytes(String.java:918)
    at java.io.UnixFileSystem.getBooleanAttributes0(Native Method)
    at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:242)
    at java.io.File.exists(File.java:819)
    at sun.misc.URLClassPath$FileLoader.getResource(URLClassPath.java:1334)
    at sun.misc.URLClassPath.getResource(URLClassPath.java:249)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1604)
    at org.hibernate.query.internal.AbstractProducedQuery.getSingleResult(AbstractProducedQuery.java:1652)
    at org.hibernate.query.criteria.internal.compile.CriteriaQueryTypeQueryAdapter.getSingleResult(CriteriaQueryTypeQueryAdapter.java:111)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution$SingleEntityExecution.doExecute(JpaQueryExecution.java:196)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:88)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:155)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:143)
    at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137)
    at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121)
    at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:159)
    at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:138)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:145)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
    at com.sun.proxy.$Proxy137.findUserByUsername(Unknown Source)
    at com.techilasoftware.parachute.app.service.AuditService.getLoggedInUser(AuditService.java:61)
    at com.techilasoftware.parachute.app.service.AuditService$$FastClassBySpringCGLIB$$93425db9.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
    at com.techilasoftware.parachute.app.service.AuditService$$EnhancerBySpringCGLIB$$41cc04e5.getLoggedInUser(<generated>)
    at com.techilasoftware.parachute.app.component.AuditorAwareImpl.getCurrentAuditor(AuditorAwareImpl.java:23)
    at sun.reflect.GeneratedMethodAccessor80.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
    at com.sun.proxy.$Proxy170.getCurrentAuditor(Unknown Source)
    at java.util.Optional.map(Optional.java:215)
    at org.springframework.data.auditing.AuditingHandler.getAuditor(AuditingHandler.java:109)
    at org.springframework.data.auditing.AuditingHandler.markCreated(AuditingHandler.java:92)
    at org.springframework.data.jpa.domain.support.AuditingEntityListener.touchForCreate(AuditingEntityListener.java:92)
    at sun.reflect.GeneratedMethodAccessor79.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.hibernate.jpa.event.internal.ListenerCallback.performCallback(ListenerCallback.java:35)
    at org.hibernate.jpa.event.internal.CallbackRegistryImpl.callback(CallbackRegistryImpl.java:95)
    at org.hibernate.jpa.event.internal.CallbackRegistryImpl.preCreate(CallbackRegistryImpl.java:55)
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:108)
    at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:185)
    at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:128)
    at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:104)
    at org.hibernate.internal.SessionImpl.persistOnFlush(SessionImpl.java:765)
    at org.hibernate.engine.spi.CascadingActions$8.cascade(CascadingActions.java:341)
    at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:499)
    at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:423)
    at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:220)
    at org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:532)
    at org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:463)
    at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:426)
    at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:220)
    at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:153)
    at org.hibernate.event.internal.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:159)
    at org.hibernate.event.internal.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:149)
    at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:82)
    at org.hibernate.event.internal.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:50)
    at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:93)
    at org.hibernate.internal.SessionImpl.autoFlushIfRequired(SessionImpl.java:1327)
    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1407)
    at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1636)
    at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1604)
    at org.hibernate.query.internal.AbstractProducedQuery.getSingleResult(AbstractProducedQuery.java:1652)
    at org.hibernate.query.criteria.internal.compile.CriteriaQueryTypeQueryAdapter.getSingleResult(CriteriaQueryTypeQueryAdapter.java:111)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution$SingleEntityExecution.doExecute(JpaQueryExecution.java:196)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:88)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:155)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:143)
    at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137)
    at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121)
    at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:159)
    at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:138)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:145)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
    at com.sun.proxy.$Proxy137.findUserByUsername(Unknown Source)
    at com.techilasoftware.parachute.app.service.AuditService.getLoggedInUser(AuditService.java:61)
    at com.techilasoftware.parachute.app.service.AuditService$$FastClassBySpringCGLIB$$93425db9.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
    at com.techilasoftware.parachute.app.service.AuditService$$EnhancerBySpringCGLIB$$41cc04e5.getLoggedInUser(<generated>)
    at com.techilasoftware.parachute.app.component.AuditorAwareImpl.getCurrentAuditor(AuditorAwareImpl.java:23)
    at sun.reflect.GeneratedMethodAccessor80.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
    at com.sun.proxy.$Proxy170.getCurrentAuditor(Unknown Source)

【问题讨论】：

  • 你在使用 Lombok @Data 注解吗？
  • 它可能不相关，但是您在@JoinColumn 中使用parachute_id 引用Parachute，它不会出现也不存在于您显示的代码中。而且堆栈跟踪似乎表明您在AuditService.getUserLoggedIn() 中遇到了错误，这看起来不像是您要添加降落伞和组件的地方。
  • 我之前一直在使用 Lombok @Data 并删除了它，但仍然没有运气。我使用AuditingEntityListener 进行审计并覆盖AuditorAware 接口以获取实际登录的User 模型进行审计。 AuditService.getUserLoggedIn() 是我使用的一种方法。
  • parachute_id 是我用来在子端实现多对一关系的列。
  • 注释掉@EntityListeners会不会失败？

标签： java hibernate jpa spring-data-jpa one-to-many


【解决方案1】：

您通过访问生命周期侦听器中的持久性上下文违反了 JPA 规范。

请参阅 JPA 规范 4.2 第 3.5.2 节

一般来说，可移植应用程序的生命周期方法不应调用 EntityManager 或查询操作、访问其他实体实例或修改同一持久性上下文中的关系。生命周期回调方法可能会修改非关系 调用它的实体的状态。

“一个可移植的应用程序不应该”是规范的说法：不要那样做，任何事情都可能发生。也许世界末日。

解决方法是不要这样做。也许正在预加载当前登录的用户并引用它，以便您可以在实体侦听器中访问它，并且不要设置对用户的引用，而是简单地存储其 id 或类似内容。

【讨论】：

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