并发执行事务时的HibernateException
并发执行事务时的HibernateException
提问于 2020-07-20 16:55:54
我有一个简单的方法：
public void addPerson(Person person) {
EntityTransaction transaction = em.getTransaction();
try {
transaction.begin();
em.persist(person);
transaction.commit();
} catch (Exception e) {
log.error("Exception occurred: ",e);
}
}当从多个线程并发调用此方法时，我将得到以下异常：
Caused by: javax.persistence.PersistenceException: org.hibernate.HibernateException: Flush during cascade is dangerous
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181)
at org.hibernate.internal.ExceptionConverterImpl.convertCommitException(ExceptionConverterImpl.java:65)
... 35 more
Caused by: org.hibernate.HibernateException: Flush during cascade is dangerous
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1449)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:511)
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3290)
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2486)
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:473)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:178)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:39)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:271)
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:104)
... 34 more如何解决这个问题？
回答 1
Stack Overflow用户
回答已采纳
发布于 2020-07-20 17:07:30
很可能，您的两个线程共享同一个Hibernate会话。会话类的文档中清楚地提到
不是有意的，实现者才是线程安全。相反，每个线程/事务都应该从SessionFactory中获得自己的实例。
因此，对于每个线程，您需要执行如下操作：
SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
Session session = sessionFactory.openSession();然后开始并提交您的事务，最后请记住关闭会话：
session.beginTransaction();
//Do something
session.getTransaction().commit();页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/63000296
复制相关文章
相似问题
腾讯云开发者
