jdbc启动错误(The driver has not received any packets from the server)

The last packet sent successfully to the server was 0  milliseconds ago. The driver has not received any packets from the server.
     at sun.reflect.GeneratedConstructorAccessor15.newInstance(Unknown Source)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java: 27 )
     at java.lang.reflect.Constructor.newInstance(Constructor.java: 513 )
     at com.mysql.jdbc.Util.handleNewInstance(Util.java: 407 )
     at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java: 1116 )
     at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java: 690 )
     at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java: 1093 )
     at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java: 2338 )
     at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java: 2371 )
     at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java: 2163 )
     at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java: 794 )
     at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java: 47 )
     at sun.reflect.GeneratedConstructorAccessor16.newInstance(Unknown Source)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java: 27 )
     at java.lang.reflect.Constructor.newInstance(Constructor.java: 513 )
     at com.mysql.jdbc.Util.handleNewInstance(Util.java: 407 )
     at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java: 378 )
     at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java: 305 )
     at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java: 135 )
     at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java: 182 )
     at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java: 171 )
     at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java: 137 )
     at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java: 1014 )
     at com.mchange.v2.resourcepool.BasicResourcePool.access$ 800 (BasicResourcePool.java: 32 )
     at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java: 1810 )
     at com.mchange.v2.async.ThreadPerTaskAsynchronousRunner$TaskThread.run(ThreadPerTaskAsynchronousRunner.java: 255 )
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.readPacket(MysqlIO.java: 614 )
     ... 20  more
2012 - 04 - 20  10 : 17 : 57 , 976 -[HL] WARN Task-Thread- for -com.mchange.v2.async.ThreadPerTaskAsynchronousRunner @3729f7  com.mchange.v2.resourcepool.BasicResourcePool - com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask @1e88181  -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new  resource, we failed to succeed more than the maximum number of allowed acquisition attempts ( 30 ). Last acquisition attempt exception:
   com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

  原因大概就是启动的时候发送了一些测试语句到mysql,但是没有得到响应,估计是连接超时的问题

   java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
     at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java: 106 )
     at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java: 65 )
     at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java: 527 )
     at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java: 128 )
     at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java: 81 )
     at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java: 111 )
     at org.hibernate.cfg.Configuration.buildSettings(Configuration.java: 2101 )
     at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java: 1325 )
     at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java: 859 )
     at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java: 855 )
     at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java: 774 )
     at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java: 211 )
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java: 1460 )
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java: 1398 )
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java: 512 )
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java: 450 )
     at org.springframework.beans.factory.support.AbstractBeanFactory$ 1 .getObject(AbstractBeanFactory.java: 290 )
     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java: 222 )
     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java: 287 )
     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java: 189 )
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java: 540 )
     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java: 842 )
     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java: 416 )
     at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java: 261 )
     at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java: 192 )
     at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java: 47 )
     at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java: 3934 )
     at org.apache.catalina.core.StandardContext.start(StandardContext.java: 4429 )
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java: 1045 )
     at org.apache.catalina.core.StandardHost.start(StandardHost.java: 722 )
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java: 1045 )
     at org.apache.catalina.core.StandardEngine.start(StandardEngine.java: 443 )
     at org.apache.catalina.core.StandardService.start(StandardService.java: 516 )
     at org.apache.catalina.core.StandardServer.start(StandardServer.java: 710 )
     at org.apache.catalina.startup.Catalina.start(Catalina.java: 583 )
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: 39 )
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: 25 )
     at java.lang.reflect.Method.invoke(Method.java: 597 )
     at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java: 288 )
     at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java: 413 )
Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while  waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool @192c07a  -- timeout at awaitAvailable()
     at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java: 1317 )
     at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java: 557 )
     at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java: 477 )
     at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java: 525 )
     ... 38  more

  这个东西以前没有注意到,上网找来了很多的解决方法

最好的如下:

jdbc.url=jdbc:mysql: //localhost:3306/totosea?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&failOverReadOnly=false

  在mysql的安装目录下找到my.ini

添加

wait_timeout= 31536000
interactive_timeout= 31536000

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