This is fragment of code. Base - MySQL.

...
PointInfo pi4 = (PointInfo)sess.load(PointInfo.class,new Integer(2));
pi4.setDescription("Description");
sess.update(pi4);

sess.flush();
sess.close();


When i do session.flush() i get exception:
net.sf.hibernate.HibernateException: identifier of an instance of PointInfo altered from 2 to 2

Something wrong with it ?

I believe the only valid time to call sessionA.update(obj) is when the obj has been loaded from a different session, say sessionB. Calling session.flush() will flush your changes to the database. so



Should write the differences.

use update in the following situation



You would do this between states in a web application for instance where pi4 was loaded on one page and updated on another server interaction.

I've try 1-st code - i get same exception. May be i need new version of server or JDBC-driver ?
Now it's 4.0.12-nt server and 3.0 Connector/J driver

This problem happens when your object returns the wrong java wrapper type from getId(). Make sure you havn't mapped integers as longs, or vice-versa.