事务回滚？ [英] transaction rolled back?

问题描述

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

我在使用持久性插入实体到数据库时发生了rollbackexception （）方法.....这个异常背后的原因是什么？

i got this rollbackexception during inserting an entity to db with persist() method.....what is the reason behind this exception?

推荐答案

您已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）。

Check that you have set all bi-directional relationships (between your com.model.Product entity and other entities related to it) correctly.

例如，如果从产品到制造商之间存在Many-1关系， ：

For example, if there was a Many-1 relationship from Product to Manufacturer you would have something like:

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

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