Alan Boudreault created CASSANDRA-15677:
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Summary: 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
Reporter: Alan Boudreault
Assignee: Alan Boudreault
*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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