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&…

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…

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…

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://…

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…

简单来说就是dubbo超时,因为dubbo默认的时间是500ms,超过这个时间它会重新访问service层,最多尝试三次. 所以我在测试的时候日志显示出来的异常为……timeout……. 开始设置开始设置的timeout=50000,小数据量可以,如果数据量比较大就不行了. 后来在服务提供端设置timeout=1200000 并且加了timeout属性的配置因该放在最后一条,否则回合配置冲突. 客户端添加timeout会造成tomcat启动延时. <dubbo:service interface…

方案一: 重启dubbo连接 zookeeper 方案二: 经压测,greys跟踪得知,是dubbo的monitor的问题.主要超时的方法是dubbo的getIP方法,monitor每次收集数据的时候都要根据域名获取zk的IP,这一步耗时很长. public String getIp() { if (ip == null) { ip = NetUtils.getIpByHost(host); } return ip; } 现在改了dubbo的源码,monitor每次收集数据的时候不获取zk的ip…

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.…

去Cloudera Server上边看了一下日志: cat /opt/cloudera-manager/log/cloudera-scm-server/cloudera-scm-server.log 日志大概如下: etConnection(LogicalConnectionImpl.java:157) at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:67…

获取资源timeout: 异常信息如下: Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.[Cause: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.reso…