事务回滚？

Question

Caused by: javax.transaction.RollbackException: Transaction marked for rollback.
at com.sun.enterprise.transaction.JavaEETransactionImpl.commit(JavaEETransactionImpl.java:473)
at com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.commit(JavaEETransactionManagerSimplified.java:852)
at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5114)
... 63 more
Caused by: java.lang.IllegalStateException: During synchronization a new object was found through a relationship that was not marked cascade PERSIST: com.model.Product[ id=1 ].
at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.discoverUnregisteredNewObjects(RepeatableWriteUnitOfWork.java:302)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.calculateChanges(UnitOfWorkImpl.java:695)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithChangeSet(UnitOfWorkImpl.java:1482)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.issueSQLbeforeCompletion(UnitOfWorkImpl.java:3135)
at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.issueSQLbeforeCompletion(RepeatableWriteUnitOfWork.java:344)
at org.eclipse.persistence.transaction.AbstractSynchronizationListener.beforeCompletion(AbstractSynchronizationListener.java:157)
at org.eclipse.persistence.transaction.JTASynchronizationListener.beforeCompletion(JTASynchronizationListener.java:68)
at com.sun.enterprise.transaction.JavaEETransactionImpl.commit(JavaEETransactionImpl.java:435)
... 65 more

在使用persist() method.....what将实体插入到数据库时，我得到了这个回滚异常。这个异常背后的原因是什么？

Answer 1

检查是否正确设置了所有双向关系(在com.model.Product实体和与其相关的其他实体之间)。

例如，如果从Product到Manufacturer存在多对一关系，您将具有如下内容：

Product product = new Product();
product.setId(1);

Manufacturer manufacturer = new Manufacturer ();
manufacturer.setId(123);
product.setManufacturer(manufacturer); // set Many-1 side of relationship

Set<Product> products = new HashSet<Product>();
products.add(product);
manufacturer.setProducts(products); // set 1-Many side of relationship

Answer 2

在插入之前检查你的hbm文件，可能会有一些级联问题( set cascade=all)。