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

大大源码 • • 未分类
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.<init>(ConnectionImpl.java:
794
)
    
at com.mysql.jdbc.JDBC4Connection.<init>(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
THE END
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