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Spring と Hibernate および mysql データベースを使用する Web アプリケーションがあります。問題は、アプリケーションがしばらく稼働していて、長時間アクティビティがない場合に、ユーザーがログインしようとすると、次の例外が発生することです。

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.exception.JDBCConnectionException: could not execute query
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

root cause

org.hibernate.exception.JDBCConnectionException: could not execute query
org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:97)
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
org.hibernate.loader.Loader.doList(Loader.java:2231)
org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2125)
org.hibernate.loader.Loader.list(Loader.java:2120)
org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:118)
org.hibernate.impl.SessionImpl.list(SessionImpl.java:1596)
org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:306)
com.smallworks.dao.impl.UserDAOImpl.getUserByLoginID(UserDAOImpl.java:102)
com.smallworks.authenticationService.impl.UserAuthenticationServiceImpl.isPasswordCorrect(UserAuthenticationServiceImpl.java:54)
com.smallworks.validation.UserLoginValidator.validate(UserLoginValidator.java:59)
com.smallworks.controller.ProjectController.signIn(ProjectController.java:84)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

root cause

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 33,781,083 milliseconds ago.  The last packet sent successfully to the server was 33,781,083 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
java.lang.reflect.Constructor.newInstance(Unknown Source)
com.mysql.jdbc.Util.handleNewInstance(Util.java:407)
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116)
com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3348)
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1967)
com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2140)
com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2626)
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2111)
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2273)
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)
org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
org.hibernate.loader.Loader.getResultSet(Loader.java:1808)
org.hibernate.loader.Loader.doQuery(Loader.java:697

そして、ユーザーが再度ログインしようとすると、正常に機能します。

以下は、私の休止状態の構成です。

<beans>   

<!-- ADD PERSISTENCE SUPPORT HERE (jpa, hibernate, etc) -->
 <tx:annotation-driven transaction-manager="transactionManager"/>

 <bean id="propertyConfigurer"
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
    p:location="/WEB-INF/jdbc.properties" />

<bean id="sessionFactory"
    class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    <property name="mappingResources">
        <list>
            <value>com/smallworks/model/User.hbm.xml</value>
            <value>com/smallworks/model/Contact.hbm.xml</value>
            <value>com/smallworks/model/Action.hbm.xml</value>
            <value>com/smallworks/model/Comment.hbm.xml</value>
        </list>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">${jdbc.dialect}</prop>
            <prop key="hibernate.show_sql">true</prop>
            <prop key="hibernate.format_sql">true</prop>
            <prop key="hibernate.connection.autocommit">false</prop>
             <!--  -->   
            <prop key="hibernate.hbm2ddl.auto">update</prop>

        </props>
    </property>
    <property name="dataSource" ref="dataSource"/>
</bean>

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

<bean id="dataSource"
      class="org.apache.commons.dbcp.BasicDataSource"
      destroy-method="close"
      p:driverClassName="${jdbc.driverClassName}"
      p:url="${jdbc.url}"
      p:username="${jdbc.username}"
      p:password="${jdbc.password}" />

applicationContext.xml

 <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${jdbc.dialect}</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.connection.autocommit">false</prop>
                 <!--  -->   
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <!-- Managing connection -->
                <prop key="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</prop>
                <prop key="c3p0.testConnectionOnCheckout">false</prop>
                <prop key="c3p0.min_size">5</prop>
                <prop key="c3p0.max_size">50</prop>
                <prop key="c3p0.timeout">300</prop>
                <prop key="c3p0.max_statements">50</prop>
                <prop key="c3p0.idleTestPeriod">300</prop>
            </props>
        </property>

上記の構成で休止状態の構成を編集しましたが、それでも効果がないようです。正しい方向へのガイダンスは大歓迎です。

よろしく。

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