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 mi ...
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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 ...
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 ...
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; ...
# #错误日志 2016-11-10 16:19:20,834 ERROR [org.quartz.core.JobRunShell] - Job DEFAULT.jobtask threw a ...
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 ...
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 ...
问题1： 连接本地mysql，报如下错误 The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from ...
