transaction timeout not working on hibernate with oracle - oracle

Question

I am having problem setting the transaction timeout for hibernate on oracle. It does not work.Can anyone help?
The "SaveOrUpdate" will not return within the stated 10 seconds. It will hang for a very long time.
I am using Oracle 10r2.
Hibernate Configuration File
<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="connection.url">jdbc:oracle:thin:#9.9.9.9:1521:orcl</property>
<property name="connection.username">foouser</property>
<property name="connection.password">foopass</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">false</property>
<!-- Mapping files -->
<mapping resource="foo.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Hibernate class
public class foo implements Serializable
{
...
public void save() throws Exception
{
Session dbSession = null;
Transaction tran = null;
try
{
dbSession = PersistenceMgr.getPersistenceMgr().getDbSession();
tran = dbSession.beginTransaction();
tran.setTimeout(10); // 10 seconds
dbSession.saveOrUpdate(this);
tran.commit();
}
catch (HibernateException e)
{
if(tran!=null)
{
try{tran.rollback();}
catch(HibernateException he){}
}
...
}
finally
{
if( dbSession != null )
{
try{dbSession.close();}
catch(HibernateException e){}
}
}
}
}

Answer 1

The timeout needs to be set before the transaction is started.
instead of
tran = dbSession.beginTransaction();
tran.setTimeout(10);// 10 seconds
try
tran = dbSession.getTransaction();
tran.setTimeout(10);
tran.begin();

Answer 2

You can see that at: http://community.jboss.org/wiki/TransactionTimeout.

Answer 3

Is this using JTA? If not, JDBC itself has no API for setting a transaction timeout so instead Hibernate attempts to manage that by tracking how much of the specified timeout period remains when executing a JDBC Statement within the transaction and setting the Statement.setQueryTimeout. It could be that there is either a bug in that logic or that the Oracle JDBC driver has a bug with regard to setting statement timeout.
If you find it is a Hibernate bug, https://hibernate.onjira.com