Question

我正在努力将应用程序从Tomcat 8移动到Weblogic 10.3.6。我们正在使用的技术堆栈：

Spring：4.1.5.RELEASE
Hibernate：4.3.5
数据库：Postgres

在Tomcat 8应用程序运行良好，但是当我尝试在Weblogic 10.3.6上进行部署时，由于应用程序正在使用JPA 2.1，所有应用程序都开始失败。在Weblogic 10.3.6上，它默认支持JPA 1，并且有一个JPA 2的补丁。

现在为了适应我们的应用程序，我试图通过将Hibernate 4.3.5降低到4.0.1来回到JPA 2.0。

并删除＆＃34; javax.persistence.Transactional＆＃34;和＆＃34; CriteriaDelete＆＃34;来自代码。

现在我正在尝试在Weblogic中部署代码，我得到了内存＆＃34;我将修复后者。

后来我尝试在Tomcat 8中部署代码，它抛出异常：

Caused by: javax.persistence.PersistenceException: [PersistenceUnit: abc] Unable to build EntityManagerFactory
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:914)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:889)
    at org.springframework.orm.jpa.vendor.SpringHibernateEjbPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateEjbPersistenceProvider.java:51)
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1625)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1562)
    ... 21 more
Caused by: org.hibernate.loader.MultipleBagFetchException: cannot simultaneously fetch multiple bags
    at org.hibernate.loader.BasicLoader.postInstantiate(BasicLoader.java:93)
    at org.hibernate.loader.entity.EntityLoader.<init>(EntityLoader.java:118)
    at org.hibernate.loader.entity.EntityLoader.<init>(EntityLoader.java:70)
    at org.hibernate.loader.entity.EntityLoader.<init>(EntityLoader.java:53)
    at org.hibernate.loader.entity.BatchingEntityLoader.createBatchingEntityLoader(BatchingEntityLoader.java:131)
    at org.hibernate.persister.entity.AbstractEntityPersister.createEntityLoader(AbstractEntityPersister.java:2323)
    at org.hibernate.persister.entity.AbstractEntityPersister.createEntityLoader(AbstractEntityPersister.java:2346)
    at org.hibernate.persister.entity.AbstractEntityPersister.createLoaders(AbstractEntityPersister.java:3612)
    at org.hibernate.persister.entity.AbstractEntityPersister.postInstantiate(AbstractEntityPersister.java:3598)
    at org.hibernate.persister.entity.SingleTableEntityPersister.postInstantiate(SingleTableEntityPersister.java:1013)
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:422)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1737)
    at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:84)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904)
    ... 27 more

请注意，在降级Hibernate之前，该应用程序运行良好。

Answer 1

我修好了。这主要是由于实体类中的多个fetchtype.Eager造成了问题。您可以在中找到有关修复的完整信息 “http://blog.eyallupu.com/2010/06/hibernate-exception-simultaneously.html”

Hibernate 4.3.5到4.0.1异常org.hibernate.loader.MultipleBagFetchException

1 个答案: