问题描述：

Caused by: java.util.concurrent.ExecutionException: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-10-14 16:05:32.671, end time: 2021-10-14 16:05:42.688, client elapsed: 1 ms, server elapsed: 10016 ms, timeout: 10000 ms, request: Request [id=326, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=getUserList, parameterTypes=[class java.lang.String], arguments=[123], attachments={path=com.service.UserService, interface=com.service.UserService, version=0.0.0, timeout=10000}]], channel: /192.168.137.16:63160 -> /10.0.31.206:20885

问题分析：

1、通过Dubbo调用其他微服务接口的连接时间超过设定的超时时间，导致报错。

解决办法：重新调用一次微服务接口即可。