Spring + Hibernate 事务需要 25 秒啥都不做

Posted 2023-03-27

【中文标题】Spring + Hibernate 事务需要 25 秒啥都不做

【英文标题】：Spring + Hibernate transaction takes 25 seconds doing nothingSpring + Hibernate 事务需要 25 秒什么都不做

【发布时间】：2010-10-12 16:18:39

【问题描述】：

我有一个使用 Spring + Hibernate 的 Java 应用程序。我有一个非常简单的事务，最近才开始需要很长时间才能执行（~25 秒），尽管它没有进行任何模糊/复杂的查询，并且根据日志，这 25 秒是在 Hiberante 的代码中花费的。浏览器只是挂在那里等到它完成......

事务通过注解完成，使用 org.springframework.orm.hibernate3.LocalSessionFactoryBean 作为会话工厂，使用 org.springframework.orm.hibernate3.HibernateTransactionManager 作为事务管理器。

对于 Hibernate 的缓存，我使用的是 Memcached，但这应该不是问题，根据日志，至少在此期间它没有触及缓存....

我在这里提交相关的日志：

 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|HibernateTransactionManager] Found thread-bound Session [org.hibernate.impl.SessionImpl@a04a093] for Hibernate transaction
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|HibernateTransactionManager] Using transaction object [org.springframework.orm.hibernate3.HibernateTransactionManager$HibernateTransactionObject@35ca1808]
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|HibernateTransactionManager] Creating new transaction with name [com.quebicoca.api.service.PaymentService.buy]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|HibernateTransactionManager] Preparing JDBC Connection of Hibernate Session [org.hibernate.impl.SessionImpl@a04a093]
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|HibernateTransactionManager] Exposing Hibernate transaction as JDBC transaction [com.mysql.jdbc.JDBC4Connection@66efd0ce]
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|TransactionSynchronizationManager] Bound value [org.springframework.jdbc.datasource.ConnectionHolder@a75b92e] for key [org.springframework.jdbc.datasource.DriverManagerDataSource@1420ca8b] to thread [http-8080-12]
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|TransactionSynchronizationManager] Initializing transaction synchronization
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|TransactionInterceptor] Getting transaction for [com.quebicoca.api.service.PaymentService.buy]
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|TransactionSynchronizationManager] Retrieved value [org.springframework.orm.hibernate3.SessionHolder@3538ce1b] for key [org.hibernate.impl.SessionFactoryImpl@c4be179] bound to thread [http-8080-12]
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|HibernateTransactionManager] Found thread-bound Session [org.hibernate.impl.SessionImpl@a04a093] for Hibernate transaction
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|TransactionSynchronizationManager] Retrieved value [org.springframework.jdbc.datasource.ConnectionHolder@a75b92e] for key [org.springframework.jdbc.datasource.DriverManagerDataSource@1420ca8b] bound to thread [http-8080-12]
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|HibernateTransactionManager] Using transaction object [org.springframework.orm.hibernate3.HibernateTransactionManager$HibernateTransactionObject@36d0805f]
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|HibernateTransactionManager] Participating in existing transaction
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|TransactionInterceptor] Getting transaction for [com.quebicoca.api.service.PaymentService.buy]
 [DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|TransactionSynchronizationManager] Retrieved value [org.springframework.orm.hibernate3.SessionHolder@3538ce1b] for key [org.hibernate.impl.SessionFactoryImpl@c4be179] bound to thread [http-8080-12]
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|HashCodeKeyStrategy] Transformed key [UserOrder_holders] to hashCode [-1959252437]
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|HashCodeKeyStrategy] Final cache key: [org.hibernate.cache.UpdateTimestampsCache:0:-1959252437]
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|MemcachedCache] Memcache.set(org.hibernate.cache.UpdateTimestampsCache:0:-1959252437)
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|SpyMemcache] MemcachedClient.set(org.hibernate.cache.UpdateTimestampsCache:0:-1959252437)
 ...
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|DispatcherServlet] Successfully completed request
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|TransactionSynchronizationManager] Removed value [org.springframework.orm.hibernate3.SessionHolder@5862af29] for key [org.hibernate.impl.SessionFactoryImpl@c4be179] from thread [http-8080-25]
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|OpenSessionInViewFilter] Closing single Hibernate Session in OpenSessionInViewFilter
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|SessionFactoryUtils] Closing Hibernate Session
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|ExceptionTranslationFilter] Chain processed normally
 [DEBUG] [2010-10-09 @ 07:25:55] [http-8080-25|SecurityContextPersistenceFilter] SecurityContextHolder now cleared, as request processing completed
 [DEBUG] [2010-10-09 @ 07:25:56] [http-8080-12|TransactionSynchronizationManager] Retrieved value [org.springframework.orm.hibernate3.SessionHolder@3538ce1b] for key [org.hibernate.impl.SessionFactoryImpl@c4be179] bound to thread [http-8080-12]
 [DEBUG] [2010-10-09 @ 07:25:56] [http-8080-12|TransactionSynchronizationManager] Retrieved value [org.springframework.orm.hibernate3.SessionHolder@3538ce1b] for key [org.hibernate.impl.SessionFactoryImpl@c4be179] bound to thread [http-8080-12]
 [DEBUG] [2010-10-09 @ 07:25:56] [http-8080-12|HibernateTemplate] Found thread-bound Session for HibernateTemplate
 [DEBUG] [2010-10-09 @ 07:25:56] [http-8080-12|HashCodeKeyStrategy] Transformed key [UserOrder] to hashCode [-1966312925]
 [DEBUG] [2010-10-09 @ 07:25:56] [http-8080-12|HashCodeKeyStrategy] Final cache key: [org.hibernate.cache.UpdateTimestampsCache:0:-1966312925]

在 25 秒间隔之前记录的最后一件事是：

[DEBUG] [2010-10-09 @ 07:25:30] [http-8080-12|TransactionSynchronizationManager] 检索值 [org.springframework.orm.hibernate3.SessionHolder@3538ce1b] 键 [org.hibernate. impl.SessionFactoryImpl@c4be179] 绑定到线程 [http-8080-12]

我是此日志期间唯一登录的人，我关闭了除我自己以外的所有人从运行在 Tomcat 前面的 Apache 的访问。

欢迎任何想法。

编辑：

根据要求添加了我的订单类：

@Entity
@Table(name = "UserOrder")
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class Order 

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @ManyToOne(optional = false)
    private Deal deal;
    @CollectionOfElements
    private Map<String, Integer> holders;
    @ManyToOne(optional = false)
    private User user;
    @org.hibernate.annotations.Type(type = "org.joda.time.contrib.hibernate.PersistentDateTime")
    @Column(nullable = false)
    private DateTime buyingDate;
    @Column(nullable = false)
    @Enumerated(EnumType.STRING)
    private OrderState state;
    private BigDecimal payedWithUserCredit;
    @Column(nullable = false)
    private int quantity;
    @Column(nullable = false)
    private String secret;

    private boolean mailSent;

    @Enumerated(EnumType.STRING)
    private PaymentMethod paymentMethod;

编辑 2：

Afeter 建议 Spy Memcached 可能有事我决定回到 EHCache。

情况变得更糟（1:16 悬空）。日志：

 [DEBUG] [2010-10-13 @ 04:28:47] [http-8080-1|HibernateTransactionManager] Triggering beforeCommit synchronization
 [DEBUG] [2010-10-13 @ 04:28:47] [http-8080-1|HibernateTransactionManager] Triggering beforeCompletion synchronization
 [DEBUG] [2010-10-13 @ 04:28:47] [http-8080-1|HibernateTransactionManager] Initiating transaction commit
 [DEBUG] [2010-10-13 @ 04:28:47] [http-8080-1|HibernateTransactionManager] Committing Hibernate transaction on Session [org.hibernate.impl.SessionImpl@20360e46]
 [DEBUG] [2010-10-13 @ 04:30:03] [http-8080-1|HibernateTransactionManager] Triggering afterCommit synchronization
 [DEBUG] [2010-10-13 @ 04:30:03] [http-8080-1|HibernateTransactionManager] Triggering afterCompletion synchronization
 [DEBUG] [2010-10-13 @ 04:30:03] [http-8080-1|TransactionSynchronizationManager] Clearing transaction synchronization
 [DEBUG] [2010-10-13 @ 04:30:03] [http-8080-1|TransactionSynchronizationManager] Removed value [org.springframework.jdbc.datasource.ConnectionHolder@30c2ea0b] for key [org.springframework.jdbc.datasource.DriverManagerDataSource@614a616] from thread [http-8080-1]
 [DEBUG] [2010-10-13 @ 04:30:03] [http-8080-1|HibernateTransactionManager] Not closing pre-bound Hibernate Session [org.hibernate.impl.SessionImpl@20360e46] after transaction
 [DEBUG] [2010-10-13 @ 04:30:03] [http-8080-1|TransactionSynchronizationManager] Retrieved value [org.springframework.orm.hibernate3.SessionHolder@839c6c7] for key [org.hibernate.impl.SessionFactoryImpl@6fbae5f5] bound to thread [http-8080-1]
 [DEBUG] [2010-10-13 @ 04:30:03] [http-8080-1|DriverManagerDataSource] Creating new JDBC DriverManager Connection to [jdbc:mysql://localhost/quebicoca]
 [DEBUG] [2010-10-13 @ 04:30:03] [http-8080-1|TransactionSynchronizationManager] Retrieved value [org.springframework.orm.hibernate3.SessionHolder@839c6c7] for key [org.hibernate.impl.SessionFactoryImpl@6fbae5f5] bound to thread [http-8080-1]

我完全迷路了......

【问题讨论】：

由于日志消息的过去时态，我假设（可能不正确）检索会话持有者在合理的时间内完成。 UserOrder 是您的课程之一吗？如果是，它是什么样的？

Jeff：不，来自TransactionSynchronizationManager 的消息意味着检索结束。 Memcached 也可能是一个问题，因为 HashCodeKeyStrategy 是 hibernate-memcached 的一个类。

我为 Jeff 添加了 Order 的代码。希望它对这个问题有所启发......

【参考方案1】：

想通了！

在@Transactional 方法中，我会这样做：

orderDAO.save(order);
user.addOrder(order);

因此订单将被保存，并添加到用户的订单集中。

当调用保存时，插入订单，但不是为持有人。

当退出该方法时，Hibernate 会检查会话中的所有模型，以查看还有哪些需要持久化（这应该表明只剩下 UserOrder_holder）。似乎永远需要通过用户的订单和相关的交易（其中大部分在不同的订单中重复）来解决这个问题。而且我不是在谈论一个庞大的数据库，用于检索订单的查询只会从数据库中返回 17 行......这很蹩脚。

无论如何，让 Order 与 Deal 的关系变得懒惰解决了这个问题，至少目前，t 可能会在稍后出现更多 Orders。