hibernate中query.list()内存不释放

[xuguiyi100]

求解决hibernate中query.list()内存不释放？

	public List<T> getList(String hql,String... values)throws Exception {
		Session session = HibernateSessionFactory.currentSession();
		List<T> list = null;
		try {
			
			Query query = session.createQuery(hql);
			for(int i = 0;i < values.length;i++){
				query.setParameter(i, values[i]);
			}
			list = (List<T>)query.list();
			session.flush();
			
			return list;
		} catch (Exception e) {
			e.printStackTrace();
			throw e;
		} finally {
			session.close();
		}
	}

HibernateSessionFactory.java

package com.rjht.dzqb.hibernate;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;

/**
 * Configures and provides access to Hibernate sessions, tied to the
 * current thread of execution.  Follows the Thread Local Session
 * pattern, see {@link http://hibernate.org/42.html}.
 */
public class HibernateSessionFactory {

    /** 
     * Location of hibernate.cfg.xml file.
     * NOTICE: Location should be on the classpath as Hibernate uses
     * #resourceAsStream style lookup for its configuration file. That
     * is place the config file in a Java package - the default location
     * is the default Java package.<br><br>
     * Examples: <br>
     * <code>CONFIG_FILE_LOCATION = "/hibernate.conf.xml". 
     * CONFIG_FILE_LOCATION = "/com/foo/bar/myhiberstuff.conf.xml".</code> 
     */
    private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";

    /** Holds a single instance of Session */
	private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();

    /** The single instance of hibernate configuration */
    private static final Configuration cfg = new Configuration();

    /** The single instance of hibernate SessionFactory */
    private static org.hibernate.SessionFactory sessionFactory;

    /**
     * Returns the ThreadLocal Session instance.  Lazy initialize
     * the <code>SessionFactory</code> if needed.
     *
     *  @return Session
     *  @throws HibernateException
     */
    public static Session currentSession() throws HibernateException {
        Session session = (Session) threadLocal.get();

		if (session == null || !session.isOpen()) {
			if (sessionFactory == null) {
				try {
					cfg.configure(CONFIG_FILE_LOCATION);				    
					sessionFactory = cfg.buildSessionFactory();
				} catch (Exception e) {
					System.err
							.println("%%%% Error Creating SessionFactory %%%%");
					e.printStackTrace();
				}
			}
			session = (sessionFactory != null) ? sessionFactory.openSession()
					: null;
			threadLocal.set(session);
		}

        return session;
    }

    /**
     *  Close the single hibernate session instance.
     *
     *  @throws HibernateException
     */
    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();
        }
    }

    /**
     * Default constructor.
     */
    private HibernateSessionFactory() {
    }

}

[花谢尊前不敢香]

如何看出来不释放的？还有session对象已经提供了getcurrentsession方法，你这个方法是为每个请求新建了一个session对象。

[xuguiyi100]

jprofiler找到内存没释放在query.list, 用这个 Session session = HibernateSessionFactory.currentSession();每次创建seesion如何理解？ 主要是session.closed了内存就是不释放。

[xuguiyi100]

有没遇到类似的问题，求解

[xuguiyi100]

源头：

有人遇到这种情况吗？

[wangzhuoyan]

你确定是这个query.list()接口不释放？还是你有其他的逻辑在里面，导致的

[执笔记忆的空白]

我之前也遇到过，就是这个list查询线程用完之后都是休眠状态，而不是真正的Close, 时间一长，容易内存溢出 不过不同的是，我手动加了close,后面这个问题就没出现过

[xuguiyi100]

引用 6 楼 shijing266 的回复:

我之前也遇到过，就是这个list查询线程用完之后都是休眠状态，而不是真正的Close, 时间一长，容易内存溢出 不过不同的是，我手动加了close,后面这个问题就没出现过

我代码都加了，closed了还是一样的。

[xuguiyi100]

引用 4 楼 xuguiyi100 的回复:

源头： 有人遇到这种情况吗？

其它没有发现问题