1 详细异常信息 The last packet sent successfully to the server was milliseconds ago. The driver has not received any packets from the server. at sun.reflect.GeneratedConstructorAccessor35.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAcce…

今天项目中报了如下错误 The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 查了下网上,都是说是mysql默认8小时关闭不用的连接.用数据库连接池导致的.可是项目中这个功能是用来导数据的,是动态连接,直接java jdbc 获取connection的,用完之后就关闭了.最后运维的人员查出来是i…

The last packet sent successfully to the server was milliseconds ago. The driver has not received any packets from the server. 今天操作数据库较大数据库访问量的时候出现问题,大致是数据库连接缓冲池的问题,弄了半天的mysql (ubuntu). 解决办法: (1)使用JDBC URL中使用autoReconnect属性,url添加 &autoReconnect=true&a…

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure::The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 解决方案: mysql数据库url中添加了aut…

1.我使用MySql数据库8.0版本,然后驱动改成了 jdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://127.0.0.1:3306/seezoon-framework?useUnicode=true&useSSL=true&characterEncoding=utf8&autoReconnect=true&serverTimezone=GMT%2B8 jdbc.username=root jdbc.pas…

异常: 结论:域名写错了或报这个异常…

解决方法: jdbc的url添加参数: jdbc.url=jdbc:mysql://localhost:3306/totosea?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&failOverReadOnly=false 在mysql的安装目录下找到my.ini中添加:将mysql回收空闲连接的时间变长,mysql默认回收时间是8小时 wait_timeout=31536000 interactive_time…

异常: Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. 整合spring boot项目过程中出现的,用了最新的mysql 连接驱动 application-dev.properties spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=…

com.mysql.cj.jdbc.Driver 是 mysql-connector-java 6及以上版本中的参数详解: jdbc.url=jdbc:mysql://localhost:3306/test?serverTimezone=Asia/Chongqing&useUnicode=true&characterEncoding=utf8&characterSetResults=utf8&useSSL=false&verifyServerCertificate=…

摘要:在本文中,总结了开发过程中最为常见的几种 MySQL 抛出的异常以及如何解决,包括高版本驱动的问题.时区配置问题.SSL 连接问题等,是一篇经验总结贴. 前言 在本文中,总结了开发过程中最为常见的几种 MySQL 抛出的异常以及如何解决,包括高版本驱动的问题.时区配置问题.SSL 连接问题等,是一篇经验总结贴,于我个人而言,这一篇足以解决目前项目中所有遇到的 MySQL 问题.同时,也希望本文能对 MySQL 数据库初学者有一定的引导入门作用. 报错如下: Could not open J…