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c3p0 空指针异常 com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.

com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@11d9f05 -- 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 atte…

数据库连接错误：CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.

学习Spring整合Hibernate的知识,新建一个工程,代码结构如下: 按如下步骤整合: 代码如下: hibernate.cfg.xml: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://…

解决：CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.

log4j给出的异常信息有下面几句: Caused by: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection at ... Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database! at ... Caused by: com.mchange.v2.re…

A ResourcePool could not acquire a resource from its primary factory or source

出处:http://aaron81939097.iteye.com/blog/1144642 原配置: <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!-- 指定连接数据库的JDBC驱动 --> <property name="driverClass"> <value>com.mysql.jdbc.…

关于使用C3P0程序报错Having failed to acquire a resource, com.mchange.v2.resourcepool的问题

由于是新手的问题,C3P0的使用时严格跟着视频来的,但是问题却来的很突然 在导入了三个包以及创建了路径以后 进行测试 class JdbcutilsTest { @Test void TestGetConnection() { Connection conn = Jdbcutils.getConnection(); System.out.println(conn); } } 第一个问题:named-config with name 'BarryLee' does not exist也就是找不到名…

Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool@1483de4 -- timeout at awaitAvailable(

Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool@1483de4 -- timeout at awaitAvailable() 把spring-dao.xml中 <property name="maxPoolSize&…

javax.naming.NoInitialContextException:Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial

小弟初次用JNDI,使用数据源连接数据库,配置完相关的xml文件后,激动的我赶紧测试了一下,结果悲剧了,报出了错误: javax.naming.NoInitialContextException:Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial…

连接mysql提示com.mchange.v2.resourcepool.BasicResourcePool

1.com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@6ff9129c com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@6ff9129c -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed ).…

【JDBC 报错】Connections could not be acquired from the underlying database!

项目启动报错: [2016-07-13 10:04:15,074] ERROR org.apache.ibatis.executor.BaseExecutor Could not get a databaseId from dataSource java.sql.SQLException: Connections could not be acquired from the underlying database! at com.mchange.v2.sql.SqlUtils.toSQLExce…

搭建SSH入过的那些坑

1.添加完相关jar包,写完配置文件,写完测试类,运行提示 WARN:Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn…