I just think this is interesting, after running a period of time, some time my Progam will throw out following exception, in my code there is nothing special, following is my code:

public void saveData(List data)
{
if(data==null || data.isEmpty())
return;

try
{
getHibernateTemplate().saveOrUpdateAll(data);
}catch (Throwable t)
{
t.printStackTrace();
}
}

but it will throw out following exception:

2006-04-09 22:13:10,156 [org.hibernate.event.def.AbstractFlushingEventListener] - Could not synchronize database state with session
[INFO] org.hibernate.exception.ConstraintViolationException: could not insert: [com.stonewatercontrols.model.data.Datapoint5minutesdata]
[INFO]
.................
org.springframework.orm.hibernate3.HibernateTemplate.saveOrUpdateAll(HibernateTemplate.java:690)
[INFO] at com.stonewatercontrols.dao.hibernate.DataDaoHibernate.saveData(DataDaoHibernate.java:52)
......


this issue is from pk duplicatie or constrain violation, but this is not the case for my program, since I log out the value for the pk or unique constrain , they are OK,

and it seems that this issue is also from buffered insert, I am not sure if this is a bug of hibernate or spring.

this issue is not repeatable , so I don't think this is from my code(see above), my code is very simple, no any specail thing there.

any advise will be appreciated.

Thanks
Jack


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Hibernate version:

Mapping documents:

Code between sessionFactory.openSession() and session.close():

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Pure guesswork, but you might want to make sure that JVM uses -server flag.

http://opensource.atlassian.com/project ... e/HHH-1579