com.mysql.jdbc.CommunicationsException: The last packet successfully received from the server was58129 seconds ago.The last packet sent successfully to the server was 58129 seconds ago, which is longer than the server configured value of 'wait_timeou…

最近在使用spring-jdbc数据库连接管理时,出现一个奇怪问题,当天部署运行没问题,第二天再试就报以下异常问题 org.springframework.dao.RecoverableDataAccessException: PreparedStatementCallback; SQL []; The last packet successfully received from the server was 56,799,849 milliseconds ago. The last packe…

1,问题现象: com.mysql.jdbc.CommunicationsException: The last packet successfully received from the server was58129 seconds ago.The last packet sent successfully to the server was 58129 seconds ago, which is longer than the server configured value of 'wai…

今天学习SSM框架整合,完成Spring和mybatis这两大框架的整合做测试时候出来很多问题,主要来自于配置文件. 我这里重点说一下Mysql数据驱动配置. 配置pom.xml时候去网站 MySQL Connector/J 找到了最新版本,也是出于好奇就配置了... <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql<…

MySQL安装 ①官网下载mysql-server(yum安装) wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm 若wget不可用,下载安装wget:yum -y install wget ②解压rpm -ivh mysql-community-release-el7-5.noarch.rpm ③安装yum install mysql-community-server ④重启mysql服务:servic…

版权所有,引用请注明出处:<<http://www.cnblogs.com/dragon/p/5203663.html >> 本文所用示例下载FlowChart.zip 一个用Netron开发的实际应用请看:发布一个免费开源软件-- PAD流程图绘制软件PADFlowChart Netron 2.2原版代码下载 一.      概述 Netron是一个开源的图形开发库,它还有一个轻量级的版本叫NetronLight,本文不讨论NetronLight. 在NetronGraphLib…

5.1 Developer Guide 1. MysQL为由Java语言编程的客户端程序提供连接:MySQL Connector/J,这是一个实现Java Database Connectivity(JDBC) API的驱动. 2.MySQL Connector/J 是一个JDBC Type 4驱动.类型4表示该驱动是纯Java实现MySQL协议,并且不依赖MySQL客户端库. 3.对于大型程序that use common design patterns of data access,考虑使用…

使用sqoop导入数据时报了如题的异常,异常的提示是 The connection property 'zeroDateTimeBehavior' acceptable values are: 'CONVERT_TO_NULL', 'EXCEPTION' or 'ROUND'. The value 'convertToNull' is not acceptable. 解决: --connect jdbc:mysql://hadoop002:3306/company?zeroDateTimeBeh…

如果连接闲置8小时 (8小时内没有进行数据库操作), mysql就会自动断开连接, 要重启tomcat. 不用hibernate的话, connection url加参数: autoReconnect=true 用hibernate的话, 加如下属性: <property name="connection.autoReconnect">true</property> <property name="connection.autoReconnect…

1.过程 同事按照文档上配置了下面的jdbc url: jdbc:mysql://ip:port/db?autoReconnect=true&useUnicode=true&characterEncoding=utf-8 结果导致了 mysql slow log 出现了满屏的 ping 命令, # User@Host: db[db] @ [ip] # Query_time: 0.000017 Lock_time: 0.000000 Rows_sent: 0 Rows_examined: 0…