Could not open Hibernate Session for transaction
2012-01-13 10:39
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spring2.x+hibernate3+struts2 在首次登陆系统时抛出的异常,再登陆就正常。 异常: javax.servlet.ServletException: org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: JDBC begin failed: root cause org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: JDBC begin failed: 解决方案: 1. 给jdbc url 增加 autoReconnect=true 一定能解决你的问题,可以定期观察一下 show processlist 改进方法如下: <property name="url" value="jdbc:mysql://localhost/数据库实例名称?&useUnicode=true&characterEncoding=utf-8&autoReconnect=true"/> 2. 寻找支持重连的连接池。 注意:c3p0连接池支持重连;重连参数是: idleConnectionTestPeriod 设置空闲连接测试周期 preferredTestQuery : 设置一查询语句,用于重连测试 testConnectionOnCheckin设置为true testConnectionOnCheckout设置为true 在sessionFactory里配置: <property name="hibernateProperties"> <props> <prop key="hibernate.autoReconnect">true</prop> </props> </property>
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