最近服务器总是出现这样的问题
项目运行在公网里，一开始运行很正常，但是隔个2,3天就会出现以上错误，一开始我们的解决方法就是删除tomcat下work的文件夹内容。然后关掉java的进程重启tomcat的就好了，可是使用一段时间就会这样。
Spring的配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"
default-autowire="byName">
<context:component-scan base-package="/"></context:component-scan>
<!-- =============================================================== -->
<!-- 配置数据库信息 hibernate -->
<!-- =============================================================== -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocation" value="classpath:hibernate.cfg.xml">
</property>
</bean>
<!--事物管理-->
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<!-- 启动注解 -->
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="connection.url">jdbc:mysql://localhost:3306/database?autoReconnect=true</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property>
<property name="connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="format_sql">true</property>
<property name="show_sql">true</property>
<property name="cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
<property name="hibernate.cache.use_query_cache">true</property>
<mapping resource="com/entity/uuuu.hbm.xml" />
<mapping resource="com/entity/uuuu.hbm.xml" />
<mapping resource="com/entity/uuuu.hbm.xml" />
<mapping resource="com/entity/uuu.hbm.xml" />
<mapping resource="com/entity/uuuu.hbm.xml" />
<mapping resource="com/entity/uuuu.hbm.xml" />
<mapping resource="com/entity/uuuu.hbm.xml" />
<mapping resource="com/entity/uuuu.hbm.xml" />
<mapping resource="com/entity/uuuuu.hbm.xml" />
<mapping resource="com/entity/uuuu.hbm.xml" />
<mapping resource="com/entity/uuuu.hbm.xml" />
<mapping resource="com/entity/uuu.hbm.xml" />
</session-factory>
</hibernate-configuration>
