09:00:30.307 [http-8080-6] ERROR org.hibernate.transaction.JDBCTransaction -JDBC begin failed com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 56,237,340 mi
对于大的项目当然我们都已经有了原有基本框架,但是对于一些新的技术探讨的时候,我们还是直接调用Class.forName("com.mysql.jdbc.Driver")连接数据库进行相关的测试 今天用HTTP大文件上传断点续传控件发布-Xproer.HttpUploader5的时候发现这有点有点忘记,所有整理一些文档进行做记录 public class HttpUploaderDB { String m_dbDriver ="com.mysql.jdbc.Driver&quo
很长的报错,截取 ERROR c.a.d.p.DruidDataSource - discard connection com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 44,866 milliseconds ago. The last pac
### Cause: com.mysql.jdbc.PacketTooBigException: Packet for query is too large (1169 > 1024). You can change this value on the server by setting the max_allowed_packet' variable. ; SQL []; Packet for query is too large (1169 > 1024). You can change
前段时间,接手一个项目使用的是原始的jdbc作为数据库的访问,发布到服务器上在运行了一段时间之后总是会出现无法访问的情况,登录到服务器,查看tomcat日志发现总是报如下的错误. Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: "Too man
一.概述 报错信息如下: org.springframework.jdbc.BadSqlGrammarException: ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'LS
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.