com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unk…

ERROR - No operations allowed after connection closed. 2011-12-07 11:36:09 - ERROR - query failed org.hibernate.exception.JDBCConnectionException: could not execute query at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:74)…

原因分析 查看了Mysql的文档,以及Connector/J的文档以及在线说明发现,出现这种异常的原因是: Mysql服务器默认的"wait_timeout"是8小时,也就是说一个connection空闲超过8个小时,Mysql将自动断开该connection.这就是问题的所在,在C3P0 pools中的connections如果空闲超过8小时,Mysql将其断开,而C3P0并不知道该connection已经失效,如果这时有Client请求connection,C3P0将该失效的Con…

网站运行一个晚上,早上来上班,发现报错: ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed. 网上查了下,由于使用了默认配置,空闲超过8小时,自动断开该连接 我使用的是mybatis的默认连接池,于是把该配的,都配置上.datasource的属性…

Mysql异常:MySQLNonTransientConnectionException: No operations allowed after statement closed MySQLNonTransientConnectionException: No operations allowed after statement closed 之所以会出现这个异常,是因为Mysql在5以后针对超长时间DB连接做了一个处理,那就是如果一个DB连接在无任何操作情况下过了8个小时后,Mysql会自动…

报错:com.mysql.cj.core.exceptions.ConnectionIsClosedException: No operations allowed after connection closed. 添加 &autoReconnect=true 无济于事,此选项好像仅对 MySQL 5之前的版本有效. 原因 Mysql服务器默认的"wait_timeout"是8小时,也就是说一个connection空闲超过8个小时,Mysql将自动断开该connection.这…

在配置文件中添加 # for initial,min,maxspring.datasource.initialSize=5spring.datasource.minIdle=5spring.datasource.maxActive=100# sql for validatingspring.datasource.validationQuery=SELECT 1# this will validate idle connection.if validation failed, will remov…

https://www.jianshu.com/p/1626d41572f2 Spring boot的单数据源配置比较简单,只需要在application.properties配置相关的jdbc连接的参数即可,下面简单的介绍下spring boot的JdbcTemplate多数据源的配置方式,因为我也是参考程序猿DD写的多数据源配置的文章来的. 参考链接: http://www.jianshu.com/p/34730e595a8c 那么我写这篇文章的目的,当然不是照抄一遍啦~~~,主要是参考配置…

一个基于springcloud的微服务项目,详细配置: SpringCloud + SpringMVC+SpringData JPA+ MySql+Postgresql 其中项目配置了多数据源,前期开发测试是没什么问题的,但是等到项目在服务器上面测试时,第二天就上午出现了数据库连接异常.经过查看日志发现下面这个异常: 注意异常信息: No operations allowed after connection closed. 也就是说jpa获取的连接是已经关闭的了,对一个关闭了的链接进行操作导致…

系统启动,一段时间不操作,然后在来操作时,报错如下: Caused by: java.sql.SQLException: Couldn't perform the operation getAutoCommit: You can't perform any operations on this connection. It has been automatically closed by Proxool for some reason (see logs). at org.logicalcobw…