Can anyone tell what this error message means? I can't seem to find anywhere on the web what exactly this message is referring to. This error occurs when I do a session.delete() on an object that contains a collection of other objects. If I can just find out what this means, I can probably figure out what I'm doing wrong.

Thanks!



Hibernate version:2.1.6

Full stack trace of any exception that occurs:
net.sf.hibernate.HibernateException: Flush during cascade is dangerous - this might occur if an object was deleted and then re-saved by cascade (remove deleted object from associations)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2181)
at net.sf.hibernate.impl.SessionImpl.save(SessionImpl.java:709)
at net.sf.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:1310)
at net.sf.hibernate.engine.Cascades$4.cascade(Cascades.java:114)
at net.sf.hibernate.engine.Cascades.cascade(Cascades.java:436)
at net.sf.hibernate.engine.Cascades.cascadeCollection(Cascades.java:526)
at net.sf.hibernate.engine.Cascades.cascade(Cascades.java:452)
at net.sf.hibernate.engine.Cascades.cascade(Cascades.java:503)
at net.sf.hibernate.engine.Cascades.cascade(Cascades.java:482)
at net.sf.hibernate.impl.SessionImpl.preFlushEntities(SessionImpl.java:2557)
at net.sf.hibernate.impl.SessionImpl.flushEverything(SessionImpl.java:2197)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2186)
at org.solley.persistence.PopulateDB.main(PopulateDB.java:189)

Name and version of the database you are using:
MySQL 4

Well there's a FAQ entry on this.

http://www.hibernate.org/117.html#A24

I've encountered this before. Basically, the object you're trying to delete would be resaved to the database by it being in a collection hanging off another object. You need to remove it from other collections before deleting it. At least, that was the situation for me...

HTH

Craig

Craig,

Thanks for the reply. I had been focusing on removing references to objects down the tree, but it never even occurred to me that the object was a member of a collection held in an object up the tree. I'll try what you suggest and see what happens. I think that will probably fix my problem though. I had seen the FAQ, but it was so terse I wasn't really clear on the problem.

Thanks again,

Tim

I added cds' explanation to the FAQ item, thanks

Michael,

Thanks for updating the FAQ. I'm sure someone will find it useful.

Tim