On Fri, Mar 17, 2023 at 9:25 AM Mick Semb Wever <m...@apache.org> wrote: > Question/Suggestion: should we improve gossip to include what the oldest > format a node has, and ensure newer versioned node joining fail/warn if it > does > not support that older format? That is, should we give a clear signal > back to operators that their rolling upgrade is not going to work smoothly, > that they are > going to hit nodes they will need to stop and do > upgradesstables on (leaving them in a state of mix-versions and nodes busy > upgrading…)
We already have this (even in 3.0!) to facilitate dropping compact storage: https://github.com/apache/cassandra/blob/cassandra-3.0/src/java/org/apache/cassandra/gms/ApplicationState.java#L59
