java - 高并发情况下Hibernate添加操作时部分线程SessionException: Session is closed!

Question

Servlet + hibernate在高并发情况下部分线程会出现org.hibernate.SessionException: Session is closed!，但是在单线程情况下不会出现。 {代码...} BaseDAO.java {代码...}

淡淡烟草味 · Answer

连接池配少了吧

大家讲道理 · Answer

解决了,将代码改成如下即可

public UserEntity queryByMainKey(long phone) {
        int retry = 0;
        entity = new UserEntity();
        Session session = factory.getCurrentSession();
        Transaction transaction = session.beginTransaction();
        while (retry++ < 3) {
            try {
                //if(!session.isOpen()) session.beginTransaction();
                Query q = session.createQuery("from UserEntity where phone=?");
                q.setLong(0, phone);

                if (q.list() == null || q.list().size() == 0) {
                    return null;
                }
                entity.Clone((UserEntity) q.list().get(0));

                return entity;
            } catch (Exception e) {
                e.printStackTrace();
                continue;
            }
        }
        return null;
    }