Erro estranho do Hbernate

public TransacaoTO buscarTransacao(TransacaoTO transacao) throws DAOException{

LOG.debug(CLASS, “buscarTransacao (TransacaoTO)”, “begin”);

Session session = null;

try

{

session = HibernateUtil.currentSession();

Query query = session.createQuery(“from TransacaoTO t where t.codigo = 1”);

List list = query.list();

return (TransacaoTO)list.get(0);

}

catch (Exception e){

throw new DAOException(e);

}

finally{

LOG.debug(CLASS, “buscarTransacao (TransacaoTO)”, “end”);

}

}