at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1913)错误
org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: JDBC begin failed: 
Caused by: org.hibernate.TransactionException: JDBC begin failed: 
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:68)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:510)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:350)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:262)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:102)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:166)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy1.find(Unknown Source)
at ookj.ui.home.LoginScreen.AreYou(LoginScreen.java:80)
at ookj.ui.home.LoginScreen.actionPerformed(LoginScreen.java:134)
at nextapp.echo2.app.button.AbstractButton.fireActionPerformed(AbstractButton.java:135)
at nextapp.echo2.app.button.AbstractButton$1.actionPerformed(AbstractButton.java:100)
at nextapp.echo2.app.button.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:70)
at nextapp.echo2.app.button.DefaultButtonModel.doAction(DefaultButtonModel.java:58)
at nextapp.echo2.app.button.AbstractButton.doAction(AbstractButton.java:121)
at nextapp.echo2.app.button.AbstractButton.processInput(AbstractButton.java:506)
at nextapp.echo2.app.update.ClientUpdateManager.process(ClientUpdateManager.java:116)
at nextapp.echo2.app.update.UpdateManager.processClientUpdates(UpdateManager.java:89)
at nextapp.echo2.webcontainer.ContainerSynchronizeService.renderUpdate(ContainerSynchronizeService.java:472)
at nextapp.echo2.webrender.service.SynchronizeService.service(SynchronizeService.java:279)
at nextapp.echo2.webrender.WebRenderServlet.process(WebRenderServlet.java:273)
at nextapp.echo2.webrender.WebRenderServlet.doPost(WebRenderServlet.java:189)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:857)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:565)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1509)
at java.lang.Thread.run(Thread.java:619)
Caused by: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: 

** BEGIN NESTED EXCEPTION ** 

java.io.EOFException

STACKTRACE:

java.io.EOFException
at