休眠c3p0连接池初始化两次

我试图为网站设置休眠的c3p0连接池。在MS SQL数据库中运行选择的连接数量我看到在min_size属性中指定的连接数量增加了一倍。看过日志后，我发现连接池似乎被初始化了两次。有谁知道它为什么会发生？休眠c3p0连接池初始化两次

日志：

[INFO] c3p0.C3P0Registry Initializing c3p0-0.9.1 [built 16-January-2007 14:46:42; 
debug? true; trace: 10] 
[INFO] impl.AbstractPoolBackedDataSource Initializing c3p0 pool... 
[email protected] [ connectionPoolDataSource -> 
[email protected] [ acquireIncrement -> 3, 
acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, .......

这里的几行后，我们再次有：

[INFO] impl.AbstractPoolBackedDataSource Initializing c3p0 pool... 
[email protected] [ connectionPoolDataSource -> 
com.mchange.v2.c3p0.Wrap......

我的Hibernate属性（部分）：

<property name="hibernate.connection.driver_class">net.sourceforge.jtds.jdbc.Driver</property> 
<property name="hibernate.connection.url">jdbc:jtds:sqlserver://192.168.0.67:1433/SSS2;instanceName=SQLEXPRESS;</property> 
<property name="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</property> 
<property name="hibernate.connection.username">DEV</property> 
<property name="hibernate.connection.password">123</property> 
<property name="hbm2ddl.auto">validate</property> 

<property name="hibernate.cache.use_second_level_cache">true</property> 
<property name="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.SingletonEhCacheRegionFactory</property> 

<property name="hibernate.show_sql">true</property> 
<property name="hibernate.format_sql">true</property> 

<property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property> 
<property name="hibernate.c3p0.min_size">6</property> 
<property name="hibernate.c3p0.max_size">10</property> 
<property name="hibernate.c3p0.timeout">300</property> 


<property name="hibernate.c3p0.max_statements">0</property> 
<property name="hibernate.c3p0.idle_test_period">100</property> 

<mapping class="***.entities.User" /> 
<mapping class="***.entities.UserRole" /> 
<mapping class="***.entities.AccountType" />

Maven的POM（部分）：

<dependency> 
    <groupId>org.apache.tapestry</groupId> 
    <artifactId>tapestry-hibernate</artifactId> 
    <version>${tapestry-release-version}</version> 
</dependency> 

<!-- Hibernate c3p0 connection pool --> 
<dependency> 
    <groupId>org.hibernate</groupId> 
    <artifactId>hibernate-c3p0</artifactId> 
    <version>${hibernate-c3p0-version}</version> 
</dependency> 

------- 
<tapestry-release-version>5.3.3</tapestry-release-version> 
<hibernate-c3p0-version>3.6.0.Final</hibernate-c3p0-version>

我使用会话工厂创建了每个事务的hibernate会话，并在try-catch语句的finally块中关闭它。（如果需要的话，并打开会话HibernateFactory刚建厂）

protected <T> List <T> findAll(Class<T> clazz) { 
    List <T> objects = null; 
    Session session = HibernateFactory.openSession(); 
    Transaction tx = session.beginTransaction(); 
    try { 
     Query query = session.createQuery("from "+clazz.getName()+" as user left join fetch user.userRole");    
     objects = query.list(); 
     tx.commit(); 
    } catch (HibernateException e) { 
     handleException(e, tx); 
    } finally { 
     HibernateFactory.close(session); 
    } 
    return objects; 
}

休眠c3p0连接池初始化两次

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