Hibernate transaction missing problem

[lpeagle]

Hi,

My business layer is using Dao with Hibernate, it works fine with unit
tests. But when I try to call it from my Netty handler, I always got
something like this:
org.hibernate.HibernateException: createCriteria is not valid without active
transaction

Any clue that why the transaction is missing even after I have called
beginTransaction on the session?

Configuration of hibernate:
<property
name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
                <property
name="current_session_context_class">thread</property>

Thanks a lot!

Bill 
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