【文章推荐】Caused by: org.hibernate.exception.GenericJDBCException: Could not open connection；Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.

原文：Caused by: org.hibernate.exception.GenericJDBCException: Could not open connection；Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.

本人今天新部署在UAT环境的war包,一直进不去系统，但是tomcat服务器 ip: 是能进去的，查询日志为： Caused by: com.mchange.v .resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v .resourcepool ...

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log报错： Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.

报错：解决方式： 1、登录数据库查看错误原因结果发现账号无法正常登录出现账号被锁定的错误。 2、如何账号解锁？用sys系统管理员账号登录数据库 SQL> alter user 用户名 account unlock; (解锁) SQL>alter user ...

报错： Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: An attempt by a client to checkout a Connection has

mysql数据库连接出问题，提示超时 java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.解决办法

mysql数据库连接出问题，提示超时，后来发现问题在于连接mysql数据库的jar包跟数据库版本不对应导致的，更换jar包一致就解决了。 ...

Could not obtain connection to query metadata : An attempt by a client to checkout a Connection has timed out.]

hibernate c3p0配置： <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans ...

配置c3p0连接池出现错误：java.sql.SQLException: An attempt by a client to checkout a Connection has timed

了mchange-commons-java-0.2.19.jar这个jar包但后边出现了：java.sql.SQLException: An ...

c3p0连接错误 An attempt by a client to checkout a Connection has timed out.

问题http://chembo.iteye.com/blog/905233 mysql最大连接数设置 http://zhidao.baidu.com/link?url=8YXlt73Ktr6pRD ...

登录Cloudera Manager时报错org.hibernate.exception.GenericJDBCException: Could not open connection

(LogicalConnectionImpl.java:157) at org.hibernate.engine.tra ...

cloudera-scm-server启动时出现Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Could not open connection

　　问题现象　　　　查看　　　　是如下的问题： ...

原文：Caused by: org.hibernate.exception.GenericJDBCException: Could not open connection；Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.

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