有时候在持久化一个obj的时候,它的某个字段太大,无法放入db字段,导致数据截断异常。在下面的代码中,我 try catch DataException 并简单地清空该字段,然后重新保存。但是,我在重新保存时遇到异常。为什么会出现批量更新异常,我该如何解决?
public static void save(Object obj) throws Exception{ try{ beginTransaction(); getSession().save(obj); commitTransaction(); }catch(Exception e){ e.printStackTrace(); rollbackTransaction(); throw e; }finally{ closeSession(); //not needed, session obtained from sf.getCurrentSession() will auto close } } public static void saveXXX(XXX rec){ try { save(rec); } catch (org.hibernate.exception.DataException e) { e.printStackTrace(); saveXXX(rec, e); //causes an exception } catch (Exception e) { e.printStackTrace(); } } private static void saveXXX(WhoisRecord rec, DataException e) { rec.setField(""); //empty out the problem field saveXXX(rec);
异常:
org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1 at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:85) at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:70) at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:90) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268) at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:114) at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:109) at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:244) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2382) at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2335) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2635) at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:115) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:168) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:365) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137) . . .
最佳答案
我不是这方面的专家,但我想我只是遇到了同样的问题,但方向相反。
看起来发生的事情是您尝试保存记录,而 Hibernate 抛出数据截断异常,这意味着它保存了一些但不是您想要的所有内容。所以你捕获了那个异常,并尝试回滚事务。但这并不总是保证成功(从我在 Hibernate save() and transaction rollback 上看到的),所以保存的数据可能仍然存在。让我们假设它是。接下来您更改您的记录,并尝试再次保存它。
但由于数据仍然存在,调用保存不会做任何事情,因为在这种情况下它应该是一个更新。因此,当您尝试提交该事务时,Hibernate 知道您要保存 1 条记录,但它成功保存了 0 条记录,因此出现错误。
尝试将 getSession().save(obj); 更改为 getSession().saveOrUpdate(obj);。这应该在记录不存在时保存记录,并在记录存在时更新它(不存在过大的字段)。
关于java - 组织.hibernate.StaleStateException : Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/5086802/