使用云服务器的mysql后经常报错CommunicationsException

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版本: v2.6 环境：本地 复现步骤： 配置成云服务器的mysql(5.7)之后，登陆有时候会报错，请求接口有时候也会报错，时好时不好。 配置为本地的mysql不会出现这个问题。 日志提供： 2022-01-12 21:36:38 [http-nio-12800-exec-5] ERROR jdbc.sqlonly - 8. Statement.executeQuery(select 1) select 1 com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 575,921 milliseconds ago. The last packet sent successfully to the server was 575,976 milliseconds ago.