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 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…

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…

首先在win通过ftp连接centos过程中,出现了2个问题,现在对此记录一下,方便后人遇到问题进行查阅 1.由于加密协议不同,需要在ftp客户端设置一下,支持ssh模式,具体自行百度: 2.在设置完协议后,centos返回Received unexpected end-of-file from SFTP server ,解决办法如下: 首先进入:vi /etc/ssh/sshd_config 将Subsystem      sftp    /usr/libexec/openssh/sftp-s…

一.android studio 编译项目时出现"AndroidStudio:Could not GET 'https://dl.google.com Received status code 400 from server: Bad Request"…

错误提示如下 Could not GET 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.1.2/ gradle-3.1.2.pom'. Received status code 400 from server: Bad Request. 但是实际上你访问此网址是能够下载这些东西的,这说明并不是网络的问题, 那么是什么问题呢? 解决方案 打开路径 C:\Users\<用户名>\.gradle 找…