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Prereq: #917
Instead of changing tmpfs to volume, we could make a separate cassandra-cluster-v4/docker-compose.yaml for persistent tests but it doesn't seem worth it yet.
The
cassandra.yaml
changes are needed to make the cassandra nodes persistent on restart, not sure why they fix the problem but I have verified that they do not cause any regressions in test runtime.The new integration test discovered a bug in
node_pool.rs
where we were accidentally copying over dead connections, so this PR fixes that as well.