java - hibernate 事务未成功启动

Question

考虑这个简单的 Hibernate 场景:

session = getHibernateSession();
tx = session.beginTransaction();
SomeObject o = (SomeObject) session.get(SomeObject.class, objectId);
tx.commit();

此代码产生以下异常:

org.hibernate.TransactionException: Transaction not successfully started
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:100)
    at com.bigco.package.Clazz.getSomeData(Clazz.java:1234)

发生了什么事？

Answer 1

好吧，看起来一旦我们到达 tx.commit() 行，事务就已经被提交了。我唯一的猜测是，当 get() 处理对象时，Hibernate 已经提交了事务。

解决方法很简单:

// commit only if tx still hasn't been committed yet (by hibernate)
if (!tx.wasCommitted())
    tx.commit();