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 ...
出现这种错误的大致情况如下: 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 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 修改MySQL的参数,my.cnf位于 etc目录下,修改完成后,重启mysql 连接数据库的时候参数问题 直接修改mysql的参数,不用重启 ...
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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 ...
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 ...
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure;;The last packet sent successfully to the server ...
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; ...
转载:https://blog.csdn.net/yaheng100/article/details/87875474 最近接手了一个SpringBoot+Mybatis+Mysql的JAVA爬虫项 ...
# #错误日志 2016-11-10 16:19:20,834 ERROR [org.quartz.core.JobRunShell] - Job DEFAULT.jobtask threw a ...
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 ...
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 ...