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org.springframework.jdbc.UncategorizedSQLException: Hibernate operation: Cannot open connection; uncategorized SQLException for SQL [???]; SQL state [null]; error code [0]; Connections could not be acquired from the underlying database!; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:83)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:80)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:80)
    at org.springframework.orm.hibernate3.HibernateAccessor.convertJdbcAccessException(HibernateAccessor.java:424)
    at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:410)
    at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:424)
    at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
    at org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:921)
    at org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:913)
    at dao.daoImpl.FaxDaoImpl.getOutBoundFaxes(FaxDaoImpl.java:94)
    at faxUpload.SecureBatchFaxFileUpload.main(SecureBatchFaxFileUpload.java:75)
Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!
    at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:529)
    at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
    at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:82)
    at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:417)
    at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
    at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:105)
    at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1561)
    at org.hibernate.loader.Loader.doQuery(Loader.java:661)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
    at org.hibernate.loader.Loader.doList(Loader.java:2145)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
    at org.hibernate.loader.Loader.list(Loader.java:2024)
    at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375)
    at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:308)
    at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:153)
    at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1106)
    at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
    at org.springframework.orm.hibernate3.HibernateTemplate$30.doInHibernate(HibernateTemplate.java:930)
    at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:419)
    ... 5 more
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
    at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1319)
    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)
    ... 23 more

我在 spring 和 hibernate 中运行一个项目，使用我的 sql 和 c3p00l 属性。这是我的 c3pool 设置

   <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
  <!--  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
     <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" >  -->
        <property name="driverClass"><value>${jdbc.driverClassName}</value></property> 
        <property name="jdbcUrl"><value>${jdbc.url}</value></property>
        <property name="user"><value>${jdbc.username}</value></property>
        <property name="password"><value>${jdbc.password}</value></property>


        </bean>

有时我会收到此异常。这是因为我的 c3pool 设置。任何帮助将不胜感激

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0 回答 0