org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.UnsupportedClassVersionError: com/mysql/jdbc/Driver : Unsupported major.minor version 52.0 (unable to load class com.mysql.jdbc.Driver) 工程基于
### 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
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unk
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
show processlist; select * from information_schema.processlist; Command: The type of command the thread is executing. 例如上面的例子中,Sleep,或者Query 时间戳timestampcreate table t_var (id VARCHAR(10),name VARCHAR(255),descs VARCHAR(500),create_time TIMESTAMP DEF
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
最近在学JAVA, SSM, 照着网上的例子系统启动后总是报这个错(IDE :IEDA): HTTP Status 500 - Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 查看错误信息, 有关键词:" Could not
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
HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.hibernate.exception.GenericJDBCException: could not execute query org.hibernate.exce