Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure;;The last packet sent successfully to the server ...
错误日志 : : , ERROR org.quartz.core.JobRunShell Job DEFAULT.jobtask threw an unhandled Exception: org.springframework.scheduling.quartz.JobMethodInvocationFailedException: Invocation of method execute o ...
2016-11-22 10:09 0 8471 推荐指数:
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure;;The last packet sent successfully to the server ...
异常错误:Communications link failure The last packet successfully received from the server was 3,544 milliseconds ago 解决方法: 找到application-druid.yml文件 ...
Communications link failure解决方法,我借鉴的别人的,延长MySQL的连接时间 #查询连接的时间 show global variables like 'wait_timeout'; #修改连接的时间set global wait_timeout=604800; ...
出现异常”The last packet sent successfully to the server was 0 milliseconds ago.“的大部分原因是由于数据库回收了连接,而系统的缓冲池不知道,继续使用被回收的连接所致的。 以mysql为例 ...
出现这种错误的大致情况如下: 1、数据库连接长时间未使用,断开连接后,再去连接出现这种情况。这种情况常见于用连接池连接数据库出现的问题 2、数据库连接的后缀参数问题 针对上述两种情况,解决方案如下 1、修改MySQL的参数,my.cnf位于/etc目录下,修改完成后,重启mysql ...
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 ...
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 ...
在这里是因为在配置文件连接数据库的url不正确 仔细查看一下,是否跟数据库一样 ...