Batch update returned unexpected row

[Lebing Xie]

I am quite new to hibernate and have to make it work.

-------------------------------------------
Google said.
"Exception happens when deleting an object.
Solution
You tried to delete an object that was allready deleted from the database.

This can happen when cascading deletes where performed somewhere and you did not reattach your object. For deleting you do not nee to reattach your object but this could prevent this problem. "
-------------------------------------------
Code:

MyType something =
(MyType) session.get(
MyType.class, primaryKey);

.......
if something != null)
{
Transaction tx = session.beginTransaction();
session.delete(something);
tx.commit();
session.flush();
HibernateUtil.closeSession();

--------------------------------------------
Error:
org.hibernate.StaleStateException: Batch update returned unexpected row
count from update: 0 actual row count: 0 expected: 1 at org.hibernate.jdbc.
BatchingBatcher.checkRowCount(BatchingBatcher.java:92) at org.hibernate.jdbc
.BatchingBatcher.checkRowCounts(BatchingBatcher.java:78) at org.hibernate.
jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:57) at org.
hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:174) at org
.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:226) at org.
hibernate.engine.ActionQueue.executeActions(ActionQueue.java:141) at org.
hibernate.event.def.AbstractFlushingEventListener.performExecutions(
AbstractFlushingEventListener.java:274) at org.hibernate.event.def.
DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.
hibernate.impl.SessionImpl.flush(SessionImpl.java:730) at org.hibernate.impl
.SessionImpl.managedFlush(SessionImpl.java:324) at org.hibernate.transaction
.JDBCTransaction.commit(JDBCTransaction.java:86) at

[Lebing Xie]

Sorry, whole codes

public static final ThreadLocal session = new ThreadLocal();

Session s = (Session) session.get();

// Open a new Session, if this Thread has none yet
if (s == null)
{
s = sessionFactory.openSession();
session.set(s);
}

MyType something =
(MyType) s.get(
MyType.class, primaryKey);

.......
if (something != null)
{
Transaction tx = session.beginTransaction();
session.delete(something);
tx.commit(); // Error
session.flush();
HibernateUtil.closeSession();