Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 2,926,157 milliseconds ago. The last packet sent successfully to the server was 2,926,158 milliseconds ago. is longer than t…
在使用mysql数据库,新建连接时,会报2003-Can't connect to server on 'localhost'(10038)错误,原因主要是MYSQL服务没有启动起来,但是进入:计算机——管理——服务中,找不到MYSQL服务,主要解决办法: 方法1: 1.找到mysql的安装路径下的 bin 文件夹下,例如我的是:"E:\dataBase\mySQL\bin"; 2.找到bin文件夹下的 “mysqld.exe” 可执行文件,双击,这样mysql服务就可以在服务中找到了…
我们有时会把别人的项目copy到自己这里进行二次开发或者参考学习,有的时候会发生下图的错误,即eclipse项目里我们导入的项目里提示HttpServletRequest 不能引用,会伴随头疼的小红叉出现 具体原因是我们工程里面web-inf/lib目录下少了相应的包:Package javax.servlet.http引起的:通俗且确切的讲就是缺少TOMCAT_HOME\lib下的servlet-api.jar.在别人的机器上他配置了Server,一般都是tomcat,而在拷贝的过程中Serv…
本地升级了下MySQL的版本,从5.6升为5.7,数据文件直接拷贝的,项目查询数据库报错: Could not retrieve transation read-only status server The last packet successfully received from the server was 20,519 milliseconds ago.  The last packet sent successfully to the server was 0 milliseconds…
今天访问已经架上服务器的网站,报错: Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 78,050,512 milliseconds ago. The last packet sent successfully to the server was 78,050,512 milliseconds ago.…
调试一个程序, 调试到一半, 下班回家, 程序卡在了某一行, 第二天早上回来一看, 发现了异常: Wed Sep :: GMT+: WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be establis…
场景:一个上传接口,需要上传几十M的文件,文件中包含10几W的数据,然后对10+W的数据进行同步批量插入,每次批量插入1W.最后返回结果. 项目上线一段时间后,上传接口出现问题,数据库用的MySQL5.7.21,报了如下错误: 2018-07-16 01:30:03.497 ERROR com.alibaba.druid.pool.DruidDataSource Line:1594 - discard connection com.mysql.jdbc.exceptions.jdbc4.Comm…
1 详细异常 ser class threw exception: java.sql.SQLException: The last packet successfully received from the server was 39,444 milliseconds ago. The last packet sent successfully to the server was 39,444 milliseconds ago. is longer than the server configu…
使用Connector/J连接MySQL数据库,程序运行较长时间后就会报以下错误: Communications link failure,The last packet successfully received from the server was * **millisecond ago. The last packet successfully sent to the server was * **millisecond ago. 其中错误还会提示你修改wait_timeout或是使用C…
问题详情 来源是,我在Ambari集群里,安装Hue. 给Ambari集群里安装可视化分析利器工具Hue步骤(图文详解 所遇到的这个问题. 然后,去ambari-server的log日志,查看,如下 cat  /var/log/ambari-server.log SEVERE: The RuntimeException could not be mapped to a response, re-throwing to the HTTP container java.lang.NullPointe…