当前没有事务处于活动状态java.lang.IllegalStateException：

Question

异常描述：org.eclipse.persistence.internal.jpa.transaction.EntityTransactionImpl.rollback当前没有事务处于活动状态

try { SessionLocal.getEntityManager().getTransaction().begin();
        tl = DAO.create(Log.bean2toplink(ls));
        SessionLocal.getEntityManager().getTransaction().commit();
        } catch (DAOException ex) {
            SessionLocal.getEntityManager().getTransaction().rollback();
            throw new DAOException("probleme createLog", ex);
        }

/////////////// DAO.create ////////////////////////

public T create(T obj, boolean isCallObserver, boolean forceFlush) throws DAOException {
        try {
            if (isCallObserver && null != SessionLocal.getSession()) {
                GenericObserver.getInstance().fireBeforeAdd(SessionLocal.getSession(), obj);
            }
            this.em.persist(obj);
            if (forceFlush) {
                this.em.flush();
                this.em.refresh(obj);
            }

            if (isCallObserver && null != SessionLocal.getSession()) {
                ApplicationContext.getInstance().getSpringContext().publishEvent(new EntityCreatedEvent<>(this, SessionLocal.getSession(), obj));
                GenericObserver.getInstance().fireAfterAdd(SessionLocal.getSession(), obj, 0);
            }
        } catch (SocketTimeoutException se){
            throw new DAOException(Constante.DOME_TIMEOUT, se);
        } catch (EntityExistsException | GenericObserverException ex) {
            throw new EntityInsertException(ex.getMessage(), ex);
        }
        return obj;
    }