连接池配置如下：
报错日志如下： [ERROR][2022-11-25T17:31:31.287+0800][com.alibaba.druid.pool.DruidPooledStatement:370][19:http-nio-9203-exec-8] _undef||traceid=00a9f113638089de0001062d00000220||spanid=a1 a00033a854918||msg=CommunicationsException, druid version 1.2.1 2, jdbcUrl : jdbc:mysql://xxx:3306/db_demo?useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai, testWhileIdle true, idle millis 40476 9, minIdle 10, poolingCount 9, timeBetweenEvictionRunsMillis 2000, lastValidIdleMillis 404769, driver com.mysql.jdbc.Driver, exceptionSorter com.alibaba.druid.pool.vendor. MySqlExceptionSorter [ERROR][2022-11-25T17:31:31.287+0800][com.alibaba.druid.pool.DruidDataSource:1879][19:http-nio-9203-exec-8] _undef||traceid=00a9f113638089de0001062d00000220||spanid=a1a000 33a854918||msg={conn-10010} discard com.mysql.cj.jdbc.exception s.CommunicationsException: Communications link failure
caused by: java.net.SocketException: Connection reset at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:115) at java.net.SocketOutputStream.write(SocketOutputStream.java:155) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at com.mysql.cj.protocol.a.SimplePacketSender.send(SimplePacketSender.java:55) at com.mysql.cj.protocol.a.TimeTrackingPacketSender.send(TimeTrackingPacketSender.java:50) at com.mysql.cj.protocol.a.NativeProtocol.send(NativeProtocol.java:584) ... 155 more