Hibernate UnknownServiceException：作为事务完成请求的未知服务 [英] Hibernate UnknownServiceException :Unknown service requested as transaction completed

问题描述

我有一个简单的类，它启动3个线程并在每个线程中保存一个新对象。但我得到了我无法理解的例外。任何人都可以帮我理解为什么这个异常？

  package test; 
 
 import java.util.Date; 
 
 import org.hibernate.Session; 
 
 import domain.Event; 
 
导入util.HibernateUtil; 
 
 public class EventBeanTest {
 
 public static void main（String [] args）{
 
 Event e1 = new Event（）; 
 e1.setTitle（111）; 
 e1.setDate（new Date（））; 
 
事件e2 =新事件（）; 
 e2.setTitle（222）; 
 e2.setDate（new Date（））; 
 
事件e3 = new Event（）; 
 e3.setTitle（333）; 
 e3.setDate（new Date（））; 
 
 
线程t1 =新线程（new EventRunnable（e1））; 
线程t2 =新线程（new EventRunnable（e2））; 
线程t3 =新线程（新的EventRunnable（e3））; 
 
 t1.setName（event  -  111）; 
 t2.setName（event  -  222）; 
 t3.setName（event  -  333）; 
 
 t1.start（）; 
 t2.start（）; 
 t3.start（）; 
 
} 
 
} 
 
 class EventRunnable implements Runnable {
 private event event; 
 
 public EventRunnable（Event event）{
 this.event = event; 
 
 
 public void run（）{
 
 System.out.println（Starting thread：+ Thread.currentThread（）。getName（））; 
 
会话会话= HibernateUtil.getSessionFactory（）。getCurrentSession（）; 
 
 session.beginTransaction（）; 
 
 session.saveOrUpdate（event）; 
 session.getTransaction（）。commit（）; 
 
 HibernateUtil.getSessionFactory（）。close（）; 
 
 System.out.println（Finishing thread：+ Thread.currentThread（）。getName（））; 
 
 
 
 
 
 
这是相关部分显示异常的日志文件：
 
 
  Hibernate：从test.EVENTS中选择max（EVENT_ID）
 Hibernate：insert into test.EVENTS（EVENT_DATE，TITLE，EVENT_ID）值（？，？，？）
 Hibernate：插入到test.EVENTS（EVENT_DATE，TITLE，EVENT_ID）插入到test.EVENTS（EVENT_DATE，TITLE，EVENT_ID）值（？，？，？）
 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop 
 INFO：HHH000030：清理连接池[jdbc：mysql：// localhost：3306 / test] 
整理线程：event  -  333 
 2012年4月22日下午2点46分55秒org.hibernate .engine.transaction.internal.jdbc.JdbcTransaction afterAfterCompletion 
 INFO：HHH000425：无法关闭会话;吞噬异常[org.hibernate.service.UnknownServiceException：未知服务请求[org.hibernate.stat.spi.StatisticsImplementor]]作为事务已完成
线程中的异常event  -  222org.hibernate.service.UnknownServiceException：Unknown service requested [org.hibernate.stat.spi.StatisticsImplementor] 
 org.hibernate.service.internal.AbstractServiceRegistryImpl.getService（AbstractServiceRegistryImpl.java:126）
 at org.hibernate.internal.SessionFactoryImpl.getStatisticsImplementor （SessionFactoryImpl.java:1708）
 at org.hibernate.internal.SessionFactoryImpl.getStatistics（SessionFactoryImpl.java:1704）
 at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.afterTransaction（TransactionCoordinatorImpl.java ：140）
 at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.afterTransactionCompletion（JdbcTransaction.java:138）
 at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit（Abst ractTransactionImpl.java:184）
 at test.EventRunnable.run（EventBeanTest.java:60）$ b $ at java.lang.Thread.run（Thread.java:722）
 2012年4月22日下午2:46:55 org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction afterAfterCompletion 
 INFO：HHH000425：无法关闭会话;吞噬异常[org.hibernate.service.UnknownServiceException：未知服务请求[org.hibernate.stat.spi.StatisticsImplementor]]作为事务已完成
线程事件 -  111中的异常org.hibernate.service.UnknownServiceException：未知service requested [org.hibernate.stat.spi.StatisticsImplementor] 
 org.hibernate.service.internal.AbstractServiceRegistryImpl.getService（AbstractServiceRegistryImpl.java:126）
 at org.hibernate.internal.SessionFactoryImpl.getStatisticsImplementor （SessionFactoryImpl.java:1708）
 at org.hibernate.internal.SessionFactoryImpl.getStatistics（SessionFactoryImpl.java:1704）
 at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.afterTransaction（TransactionCoordinatorImpl.java ：140）
 at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.afterTransactionCompletion（JdbcTransaction.java:138）
 at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit（Abst ractTransactionImpl.java:184）
 at test.EventRunnable.run（EventBeanTest.java:60）
 at java.lang.Thread.run（Thread.java:722）
  
 $ b 
 编辑1  
 <？xml version ='1.0'encoding ='utf-8'？> 
  
 
 
 
 
 
 < session-factory> 
 
 <！ - 数据库连接设置 - > 
< property name =connection.driver_class> com.mysql.jdbc.Driver< / property> 
< property name =connection.url> jdbc：mysql：// localhost：3306 / test< / property> 
< property name =connection.username> vishnu< / property> 
< property name =connection.password> con02305< / property> 
 
 <！ -  JDBC连接池（使用内置） - > 
< property name =connection.pool_size> 1< / property> 
 
 <！ -   -  SQL方言 - > 
< property name =hibernate.dialect> org.hibernate.dialect.MySQLDialect< / property> 
 
 <！ - 启用Hibernate的自动会话上下文管理 - > 
< property name =current_session_context_class>线程< / property> 
 
 <！ - 禁用二级缓存 - > 
< property name =cache.provider_class> org.hibernate.cache.internal.NoCacheProvider< / property> 
 
 <！ - 将所有执行的SQL回复到stdout  - > 
< property name =show_sql> true< / property> 
 
<！ - 在启动时删除并重新创建数据库模式
< property name =hbm2ddl.auto>更新< / property> - > 
 
< property name =default_schema>测试< /属性> 
< property name =show_sql> true< / property> 
 
< mapping resource =domain / Event.hbm.xml/> 
 
< / session-factory> 
  
  
 
解决方案
 Hibernate中的Session对象不是线程安全的，除非您同步对Session对象的访问，否则不应该在不同线程中使用同一个会话。
 
I have a simple class which starts 3 threads and saves a new object in each thread. But I am getting exception which i cannot understand. Can anyone help me understand why the exception?
package test;

import java.util.Date;

import org.hibernate.Session;

import domain.Event;

import util.HibernateUtil;

public class EventBeanTest {

    public static void main(String [] args) {

        Event e1 = new Event();
        e1.setTitle("111");
        e1.setDate(new Date());

        Event e2 = new Event();
        e2.setTitle("222");
        e2.setDate(new Date());

        Event e3 = new Event();
        e3.setTitle("333");
        e3.setDate(new Date());


        Thread t1 = new Thread(new EventRunnable(e1));
        Thread t2 = new Thread(new EventRunnable(e2));
        Thread t3 = new Thread(new EventRunnable(e3));

        t1.setName("event - 111");
        t2.setName("event - 222");
        t3.setName("event - 333");

        t1.start();
        t2.start();
        t3.start();

    }

}

class EventRunnable implements Runnable {
    private Event event;

    public EventRunnable(Event event) {
        this.event = event;
    }

    public void run() {

        System.out.println("Starting thread : " + Thread.currentThread().getName());

        Session session = HibernateUtil.getSessionFactory().getCurrentSession();

        session.beginTransaction();

        session.saveOrUpdate(event);
        session.getTransaction().commit();

        HibernateUtil.getSessionFactory().close();

        System.out.println("Finishing thread : " + Thread.currentThread().getName());

    }
}
And this is the relevant part of the log file showing the exception:
Hibernate: select max(EVENT_ID) from test.EVENTS
Hibernate: insert into test.EVENTS (EVENT_DATE, TITLE, EVENT_ID) values (?, ?, ?)
Hibernate: insert into test.EVENTS (EVENT_DATE, TITLE, EVENT_ID) values (?, ?, ?)
Hibernate: insert into test.EVENTS (EVENT_DATE, TITLE, EVENT_ID) values (?, ?, ?)
Apr 22, 2012 2:46:55 PM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop
INFO: HHH000030: Cleaning up connection pool [jdbc:mysql://localhost:3306/test]
Finishing thread : event - 333
Apr 22, 2012 2:46:55 PM org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction afterAfterCompletion
INFO: HHH000425: Could not close session; swallowing exception[org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.stat.spi.StatisticsImplementor]] as transaction completed
Exception in thread "event - 222" org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.stat.spi.StatisticsImplementor]
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:126)
    at org.hibernate.internal.SessionFactoryImpl.getStatisticsImplementor(SessionFactoryImpl.java:1708)
    at org.hibernate.internal.SessionFactoryImpl.getStatistics(SessionFactoryImpl.java:1704)
    at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.afterTransaction(TransactionCoordinatorImpl.java:140)
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.afterTransactionCompletion(JdbcTransaction.java:138)
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:184)
    at test.EventRunnable.run(EventBeanTest.java:60)
    at java.lang.Thread.run(Thread.java:722)
Apr 22, 2012 2:46:55 PM org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction afterAfterCompletion
INFO: HHH000425: Could not close session; swallowing exception[org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.stat.spi.StatisticsImplementor]] as transaction completed
Exception in thread "event - 111" org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.stat.spi.StatisticsImplementor]
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:126)
    at org.hibernate.internal.SessionFactoryImpl.getStatisticsImplementor(SessionFactoryImpl.java:1708)
    at org.hibernate.internal.SessionFactoryImpl.getStatistics(SessionFactoryImpl.java:1704)
    at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.afterTransaction(TransactionCoordinatorImpl.java:140)
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.afterTransactionCompletion(JdbcTransaction.java:138)
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:184)
    at test.EventRunnable.run(EventBeanTest.java:60)
    at java.lang.Thread.run(Thread.java:722)
EDIT 1
<?xml version='1.0' encoding='utf-8'?>


<session-factory>

    <!-- Database connection settings -->
    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="connection.url">jdbc:mysql://localhost:3306/test</property>
    <property name="connection.username">vishnu</property>
    <property name="connection.password">con02305</property>

    <!-- JDBC connection pool (use the built-in) -->
    <property name="connection.pool_size">1</property>

    <!-- SQL dialect -->
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

    <!-- Enable Hibernate's automatic session context management -->
    <property name="current_session_context_class">thread</property>

    <!-- Disable the second-level cache  -->
    <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>

    <!-- Echo all executed SQL to stdout -->
    <property name="show_sql">true</property>

    <!-- Drop and re-create the database schema on startup 
    <property name="hbm2ddl.auto">update</property> -->

    <property name="default_schema">test</property>
    <property name="show_sql">true</property>

    <mapping resource="domain/Event.hbm.xml"/>

</session-factory>
解决方案
Session object in Hibernate is not thread safe, you should not use the same session in different threads, unless you synchornize access to Session object.

                        
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