org.springframework.dao.DataAccessResourceFailureException: could not execute query; nested exceptio

遇到一个问题，连的两个数据源，其中一个数据源在请求的的时候出现一下报错：

org.springframework.dao.DataAccessResourceFailureException: could not execute query; nested exception is org.hibernate.exception.JDBCConnectionException: could not execute query

    org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:625)
    org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
    org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:411)
    org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
    org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:912)
    com.ivo.core.HibernateCaller.find(HibernateCaller.java:109)
    com.ivo.security.contract.ContractServiceold.searchDepartment(ContractServiceold.java:22)
    com.ivo.security.contract.ContractServiceold$$FastClassByCGLIB$$dd47922b.invoke(<generated>)
    net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
    org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:617)
    com.ivo.security.contract.ContractServiceold$$EnhancerByCGLIB$$c9aea004.searchDepartment(<generated>)
    com.ivo.security.contract.ContractController.findDepartment(ContractController.java:78)
    sun.reflect.GeneratedMethodAccessor361.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)
    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:710)

    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

stackoverflow上说要把driver放到tomcat下而不是war包里。我去试试哈~~

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