Hello,

For the moment I'm developing a webshop, the architecture is based on Spring - Hibernate - Struts & Mysql. After ... minutes I get an "explosion" of open databaseconnection. I tried the c3p0 connection pool also but that gives the same problems (crasch of application after several minutes). I got the best result with following configuration : (but still connection explosion).


jdbc.properties file
hibernate.dialect org.hibernate.dialect.MySQLDialect
hibernate.connection.driver_class com.mysql.jdbc.Driver
hibernate.connection.url jdbc:mysql://localhost:3306/rdcoshop?autoReconnect=true
hibernate.connection.username rdcoshop
hibernate.connection.password rdcoshop

jdbc.properties file
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<!-- ========================================================== PROPERTY CONF-->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties"/>
</bean>

<!-- ========================================================== DATASOURCE -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${hibernate.connection.driver_class}"/>
<property name="url" value="${hibernate.connection.url}"/>
<property name="username" value="${hibernate.connection.username}"/>
<property name="password" value="${hibernate.connection.password}"/>
</bean>

<!-- ========================================================== HIBERNATE -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource"><ref local="dataSource"/></property>

<property name="mappingResources">
<list>
<value>Users.hbm.xml</value>
</list>
</property>

<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.query.substitutions">true 1, false 0, yes 'Y', no 'N'</prop>
<prop key="hibernate.max_fetch_depth">1</prop>
</props>
</property>
</bean>

<!-- ========================================================== TRANSACTIONS -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory"><ref local="sessionFactory"/></property>
</bean>

<bean id="rightDAO" class="db.persistence.RightDAOImpl">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>


</beans>


Does anyone know if this is a general problem between spring - hibernate & mysql ? Can anyone give me the ideal setup?

Thanks for your help !!!