數據庫鏈接超時異常

The last packet successfully received from the server was 32,399,735 milliseconds ago.  The last packet sent successfully to the server was 0 milliseconds ago.
	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1112)
	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3092)
	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2978)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3526)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1989)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2150)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2620)
	at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5022)
	at org.apache.tomcat.dbcp.dbcp.DelegatingConnection.setAutoCommit(DelegatingConnection.java:331)
	at org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:317)
	at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:63)
	at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
	at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:494)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:315)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:257)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:102)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
	at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:652)
	at com.sinosoft.sepmis.inspection.service.InspectionDataServiceImpl$$EnhancerByCGLIB$$e65cc02b.saveInspectionData(<generated>)
	at com.sinosoft.sepmis.util.ConnectionTelnet.execute(ConnectionTelnet.java:319)
	at com.sinosoft.sepmis.util.InspectionUtil.inspectExecute(InspectionUtil.java:331)
	at com.sinosoft.sepmis.util.InspectionUtil.timer(InspectionUtil.java:79)
	at com.sinosoft.sepmis.quartz.QuartzJobTask.execute(QuartzJobTask.java:196)
	at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:529)
Caused by: java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
	at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2539)
	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2989)
	... 23 more
	org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: JDBC begin failed:

緣由：數據庫鏈接超時形成，

解決：

方法一、修改mysql數據庫wait_timeout配置屬性，將mysql數據庫鏈接時間增加。

方法二、修改Hibernate配置
<!-- lang: xml -->
<prop key="hibernate.connection.autoReconnect">true</prop>
<prop key="hibernate.connection.autoReconnectForPools">true</prop>
<prop key="hibernate.connection.is-connection-validation-required">true</prop>