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https://issues.apache.org/jira/browse/CASSANDRA-15677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17129650#comment-17129650
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Brandon Williams commented on CASSANDRA-15677:
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Do you have links to the CI runs?
> Topology events are not sent to clients if the nodes use the same network
> interface
> -----------------------------------------------------------------------------------
>
> Key: CASSANDRA-15677
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15677
> Project: Cassandra
> Issue Type: Bug
> Components: Messaging/Client
> Reporter: Alan Boudreault
> Assignee: Bryn Cooke
> Priority: Normal
> Labels: pull-request-available
> Fix For: 4.0-rc
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> *This bug only happens when the cassandra nodes are configured to use a
> single network interface (ip) but different ports. See CASSANDRA-7544.*
> Issue: The topology events aren't sent to clients. The problem is that the
> port is not taken into account when determining if we send it or not:
> https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/transport/Server.java#L624
> To reproduce:
> {code}
> # I think the cassandra-test branch is required to get the -S option
> (USE_SINGLE_INTERFACE)
> ccm create -n4 local40 -v 4.0-alpha2 -S
> {code}
>
> Then run this small python driver script:
> {code}
> import time
> from cassandra.cluster import Cluster
> cluster = Cluster()
> session = cluster.connect()
> while True:
> print(cluster.metadata.all_hosts())
> print([h.is_up for h in cluster.metadata.all_hosts()])
> time.sleep(5)
> {code}
> Then decommission a node:
> {code}
> ccm node2 nodetool disablebinary
> ccm node2 nodetool decommission
> {code}
>
> You should see that the node is never removed from the client cluster
> metadata and the reconnector started.
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