seqwait opened a new issue, #9960:
URL: https://github.com/apache/dubbo/issues/9960

   dubbo version: 2.6.5
   provider: docker 应用 DUBBO_IP_TO_REGISTRY: "内网IP"
   problem: 运行了好几个月没问题,今天发现不通了, 今天用arthas trace 跟踪发现根本没有调用
   telnet 30002 也没问题
   spring-dubbo config 
   ```
     <dubbo:registry address="${dubbo.zookeeper.url}" timeout="10000"/>
       <dubbo:annotation package="com.mzo.support.elastic"/>
       <dubbo:protocol name="dubbo" port="30002" charset="UTF-8" 
threadpool="fixed" threads="300"/>
     <dubbo:consumer timeout="10000" check="false"/>
   ```
   Caused by: com.alibaba.dubbo.remoting.TimeoutException: Waiting server-side 
response timeout by scan timer. start time: 2022-04-23 16:01:30.060, end time: 
2022-04-23 16:01:36.081, client elapsed: 0 ms, server elapsed: 6021 ms, 
timeout: 6000 ms, request: Request [id=1470338, version=2.0.2, twoway=true, 
event=false, broken=false, data=RpcInvocatio
   
   tcpdump抓特定端口30002 如下
   
![image](https://user-images.githubusercontent.com/12809333/164886574-9a6af418-8953-4810-aa04-41753bb55042.png)
   


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