从hibernate 3.6升级到hibernate 4.3.5时，由于@ElementCollection，我得到了以下异常： -
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory_1': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Collection element (many-to-many) table alias cannot be empty
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:398)
at com.s.af.persistence.HibernateEntityManagerFactoryBuilder.build(HibernateEntityManagerFactoryBuilder.java:53)
at com.s.af.persistence.PersistenceServiceImpl.buildEntityManagerFactory(PersistenceServiceImpl.java:218)
at com.s.af.persistence.PersistenceServiceImpl$EntityManagerFactoryMultitenantHolderCallback.build(PersistenceServiceImpl.java:263)
at com.s.af.persistence.PersistenceServiceImpl$EntityManagerFactoryMultitenantHolderCallback.build(PersistenceServiceImpl.java:259)
at com.s.af.multitenant.MultitenantHolder.get(MultitenantHolder.java:54)
at com.s.af.multitenant.MultitenantHolder.get(MultitenantHolder.java:44)
at com.s.af.persistence.PersistenceServiceImpl.getEntityManagerFactory(PersistenceServiceImpl.java:227)
at com.s.af.persistence.MultitenantEntityManagerFactory.getDataSource(MultitenantEntityManagerFactory.java:131)
at org.springframework.orm.jpa.JpaTransactionManager.afterPropertiesSet(JpaTransactionManager.java:308)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
... 73 more
Caused by: java.lang.IllegalStateException: Collection element (many-to-many) table alias cannot be empty
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.renderManyToManyJoin(LoadQueryJoinAndFetchProcessor.java:357)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.renderJoin(LoadQueryJoinAndFetchProcessor.java:154)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoin(LoadQueryJoinAndFetchProcessor.java:137)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:132)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoin(LoadQueryJoinAndFetchProcessor.java:138)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:132)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:113)
at org.hibernate.loader.plan.exec.internal.AbstractLoadQueryDetails.generate(AbstractLoadQueryDetails.java:171)
at org.hibernate.loader.plan.exec.internal.EntityLoadQueryDetails.<init>(EntityLoadQueryDetails.java:106)
at org.hibernate.loader.plan.exec.internal.BatchingLoadQueryDetailsFactory.makeEntityLoadQueryDetails(BatchingLoadQueryDetailsFactory.java:73)
at org.hibernate.loader.entity.plan.AbstractLoadPlanBasedEntityLoader.<init>(AbstractLoadPlanBasedEntityLoader.java:100)
at org.hibernate.loader.entity.plan.EntityLoader.<init>(EntityLoader.java:134)
at org.hibernate.loader.entity.plan.EntityLoader.<init>(EntityLoader.java:55)
at org.hibernate.loader.entity.plan.EntityLoader$Builder.byUniqueKey(EntityLoader.java:98)
at org.hibernate.loader.entity.plan.EntityLoader$Builder.byPrimaryKey(EntityLoader.java:94)
at org.hibernate.loader.entity.plan.AbstractBatchingEntityLoaderBuilder.buildNonBatchingLoader(AbstractBatchingEntityLoaderBuilder.java:47)
at org.hibernate.loader.entity.BatchingEntityLoaderBuilder.buildLoader(BatchingEntityLoaderBuilder.java:76)
at org.hibernate.persister.entity.AbstractEntityPersister.createEntityLoader(AbstractEntityPersister.java:2506)
at org.hibernate.persister.entity.AbstractEntityPersister.createEntityLoader(AbstractEntityPersister.java:2528)
at org.hibernate.persister.entity.AbstractEntityPersister.createLoaders(AbstractEntityPersister.java:4035)
at org.hibernate.persister.entity.AbstractEntityPersister.postInstantiate(AbstractEntityPersister.java:4017)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:481)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1857)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:397)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842)
at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:152)
at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:67)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:336)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
... 45 more
Caused by: java.lang.IllegalStateException: Collection element (many-to-many) table alias cannot be empty
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.renderManyToManyJoin(LoadQueryJoinAndFetchProcessor.java:357)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.renderJoin(LoadQueryJoinAndFetchProcessor.java:154)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoin(LoadQueryJoinAndFetchProcessor.java:137)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:132)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoin(LoadQueryJoinAndFetchProcessor.java:138)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:132)
at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:113)
at org.hibernate.loader.plan.exec.internal.AbstractLoadQueryDetails.generate(AbstractLoadQueryDetails.java:171)
at org.hibernate.loader.plan.exec.internal.EntityLoadQueryDetails.<init>(EntityLoadQueryDetails.java:106)
at org.hibernate.loader.plan.exec.internal.BatchingLoadQueryDetailsFactory.makeEntityLoadQueryDetails(BatchingLoadQueryDetailsFactory.java:73)
at org.hibernate.loader.entity.plan.AbstractLoadPlanBasedEntityLoader.<init>(AbstractLoadPlanBasedEntityLoader.java:100)
at org.hibernate.loader.entity.plan.EntityLoader.<init>(EntityLoader.java:134)
at org.hibernate.loader.entity.plan.EntityLoader.<init>(EntityLoader.java:55)
at org.hibernate.loader.entity.plan.EntityLoader$Builder.byUniqueKey(EntityLoader.java:98)
at org.hibernate.loader.entity.plan.EntityLoader$Builder.byPrimaryKey(EntityLoader.java:94)
at org.hibernate.loader.entity.plan.AbstractBatchingEntityLoaderBuilder.buildNonBatchingLoader(AbstractBatchingEntityLoaderBuilder.java:47)
at org.hibernate.loader.entity.BatchingEntityLoaderBuilder.buildLoader(BatchingEntityLoaderBuilder.java:76)
at org.hibernate.persister.entity.AbstractEntityPersister.createEntityLoader(AbstractEntityPersister.java:2506)
at org.hibernate.persister.entity.AbstractEntityPersister.createEntityLoader(AbstractEntityPersister.java:2528)
at org.hibernate.persister.entity.AbstractEntityPersister.createLoaders(AbstractEntityPersister.java:4035)
at org.hibernate.persister.entity.AbstractEntityPersister.postInstantiate(AbstractEntityPersister.java:4017)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:481)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1857)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:397)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842)
at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:152)
at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:67)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:336)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
... 45 more
根据jira问题https://hibernate.atlassian.net/browse/HHH-8839，这个问题将在hibernate 4.3.7中修复。暂时还有一些解决方法吗？
我的实体类如下（为简单起见，已删除了一些不必要的部分）： -
Entity
@Table(name = "RUN_DATA")
@Access(AccessType.PROPERTY)
public class RunData {
private Long id;
private Map<RunData, Boolean> predecessors;
private String name;
@Id
@GenericGenerator(name = "processing-seq-generator",
strategy = "sequence-identity",
parameters = @Parameter(name = "sequence", value = "RUN_DATA_RD_ID_SEQ"))
@GeneratedValue(generator = "processing-seq-generator")
@Column(name = "RD_ID", nullable = false)
@Override
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Column(name = "RD_NAME")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@ElementCollection(fetch = FetchType.EAGER)
@JoinTable(name = "RUN_DEPENDENCIES",
joinColumns = @JoinColumn(name = "RDP_DEPENDENT_ID"))
@MapKeyJoinColumn(name = "RDP_DEPENDS_ON_ID")
@Column(name = "RDP_IGNORE_PREDECESSOR_ERRORS")
public Map<RunData, Boolean> getPredecessors() {
return predecessors;
}
public void setPredecessors(Map<RunData, Boolean> predecessors) {
this.predecessors = predecessors;
}
}
表结构如下： 表 - ＆GT; RUN_DATA
RD_ID | RD_NAME 1 | P1 2 | P2
表格 - ＆gt; RUN_DEPENDENCIES
RDP_DEPENDENT_ID | RDP_DEPENDS_ON_ID | RDP_IGNORE_PREDECESSOR_ERRORS 2 | 1 | 1
注意： - 更改表格结构对我来说不是一个选项！
答案 0 :(得分：0)
解决方法是使元素集合关联变得懒惰。
@ElementCollection(fetch = FetchType.LAZY)