Question

Connections could not be acquired from the underlying database!

问题如下，请问该如何解决？？？
2009-07-14 09:26:22,859 WARN [org.hibernate.util.JDBCExceptionReporter] - SQL Error: 0, SQLState: null
2009-07-14 09:26:22,859 ERROR [org.hibernate.util.JDBCExceptionReporter] - Connections could not be acquired from the

underlying database!
2009-07-14 09:26:22,875 WARN [org.hibernate.cfg.SettingsFactory] - Could not obtain connection metadata
java.sql.SQLException: Connections could not be acquired from the underlying database!
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection

(C3P0PooledConnectionPool.java:264)
at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
at com.mchange.v2.c3p0.ComboPooledDataSource.getConnection(ComboPooledDataSource.java:521)
at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection

(LocalDataSourceConnectionProvider.java:81)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:76)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1933)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1216)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory

(LocalSessionFactoryBean.java:807)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory

(LocalSessionFactoryBean.java:740)
at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet

(AbstractSessionFactoryBean.java:131)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods

(AbstractAutowireCapableBeanFactory.java:1062)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean

(AbstractAutowireCapableBeanFactory.java:1029)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean

(AbstractAutowireCapableBeanFactory.java:420)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:245)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton

(DefaultSingletonBeanRegistry.java:141)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:242)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:156)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference

(BeanDefinitionValueResolver.java:246)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary

(BeanDefinitionValueResolver.java:128)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues

Answer 1

不是你的配置文件中数据库信息写错了，就是数据库没有启动， 这个异常是无法取得数据库连接。