I am tottaly new to hibernate and here is my code:

public void addUser(String name, Date date)
{
try {
Session session= sessionFactory.openSession();
Partner partner=new Partner();
partner.setName(name);
partner.setBirth(date);
Transaction transaction = session.beginTransaction();
session.save(partner);
transaction.commit();
session.close();
}catch(Exception ex){
logger.error(ex.toString());
}
- it is in a Session bean-
Every thing works fine and it even do commit to the database but gives an error:
net.sf.hibernate.TransactionException: Commit failed with SQL exception: : You cannot commit during a managed transaction!

What is wrong here?

Maybe not enough information but if this is running under a SLSB with CMT then its up to the container to start and commit the transaction. Rollback must be hinted at. You just open, flush and close the session.

It is running unser jboss and the mentioned code is in a stateless session bean. and here is my hibernate.cfg.xml:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">

<hibernate-configuration>

<session-factory>

<property name="connection.datasource">java:/shabwareDS</property>
<property name="show_sql">false</property>
<property name="use_outer_join">true</property>
<property name="dialect">net.sf.hibernate.dialect.PostgreSQLDialect</property>

<!-- Mapping files -->
<mapping resource="org/shabdiz/shabware/entity/PartnerValue.hbm.xml"/>

</session-factory>

</hibernate-configuration>

But what david was pointing out that it is more a question of whether your ejb is under CMT control. In other words, are you specifying "Container" as the transaction attribute in the ejb deployment descriptor? If so, as per ejb specs, it is not legal to manually attempt to "tinker" with the JTA transaction started by the container or any of the connections under the control of the container (which is exactly what the transaction.commit() in your code is doing).

You are right! :"> i can't believe that I was such a fool!
Thanks a lot.