Waiting server-side response timeout

[seqwait]

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

[AlbumenJ]

应该是网络本身有问题导致请求写不出去