duhenglucky commented on issue #3480:
URL: https://github.com/apache/rocketmq/issues/3480#issuecomment-971116631
> i want to know whether two ip is the same in docker overlay mode of two
machines
Under HOST networking mode, all dockers managed by Rancher are with the same
docker0 IP, which is 172.17.0.1. Thus, RemotingUtil.getLocalAddress() always
returns "172.17.0.1" for those dockers, which leads to a collision between
consumers with the same PID, if using default "IP@pid" clientId.
But it's recommended you bump up your client version to the lastest, because
the instanceName change to a new one with nanoTime to prevent this collision:
` if (this.instanceName.equals("DEFAULT")) {
this.instanceName = UtilAll.getPid() + "#" + System.nanoTime();
}`
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