himanshug commented on issue #6698: do not watch unwanted tier's data node in HttpServerInventoryView URL: https://github.com/apache/incubator-druid/pull/6698#issuecomment-486843576 @jihoonson historicals don't announce to either coordinator/broker. coordinator/broker watch that information. so broker needs to stop getting(or discarding) the stuff it doesn't need. a bit more detail.... in case of "zookeeper": historicals publish information about segments served in specific zookeeper nodes. coordinator/broker watch those paths. in case of "http" , coordinator/broker send http request to get what segments are served by historical. historical does not need to announce segments anywhere in this case. By default historicals are always announcing in zookeeper so that users can seamlessly change between zookeeper or http at broker/coordinator . If someone is using http at all coordinators/brokers, they can change historical config ( druid.announcer.skipSegmentAnnouncementOnZk=false) so that it doesn't announce segments in zookeeper anymore. That property is undocumented currently because of the non-production-ready official status of http stuff.
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