Hello,

I've got a problem with SessionImpl not evicting newly created objects... but first thing first...

1. My objects have composite Ids

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
<class name="hibernate.UserWord, hibernate" table="user_word">
<composite-id>
<key-property name="UserId" column="user_id" />
<key-property name="Word" column="word" />
</composite-id>

<property name="Score" column="score"></property>
</class>
</hibernate-mapping>

2. In a loop I create new object and do

try {
session.Save(uw); session.Flush();
}
catch (Exception e)
{
session.Evict(uw);
}

I do end up with duplicate objects and get the exception, so session.Evict() is called and I see object removed, but session.insertions still holds something about that duplicate object I am evicting. So next time I call session.Flush() I get the same exception again and again....

Work around is to recreate the session instead of evicting bad object, but this breaks transactions that I want (I did started with transactions and the example above is simplified version so the problem would be obvious)

Just to be sure I implemented

public override bool Equals(Object obj)
{
if (obj == null || GetType() != obj.GetType()) return false;
UserWord uw = (UserWord)obj;
return Word.Equals(uw.Word) && UserId.Equals(uw.UserId);
}

and

public override int GetHashCode ()
{
return Word.GetHashCode() ^ UserId.GetHashCode();
}

but it didn't change anything.

Since I am a novice with NHibernate I am not sure if it is a bug or I am abusing NHibernate is some way, but I don't see what I am doing wrong.

Any ideas?

Thanks

You shouldn't reuse the session after an exception, it's not supported. You have to rollback the transaction, close the session, and start a new one. Don't worry about session creation, it's a relatively fast operation.