Hi all, I have two Cassandra clusters running 4.1.6 (managed by K8ssandra Operator), one for prod and one staging. I would like to upgrade to the latest patch version (4.1.10) in order to benefit from the latest patches and bugfixes.
I tried upgrading the staging cluster directly from 4.1.6 to 4.1.10 and it seemed to have worked (nodes restarted one by one and came up normally). The only strange thing that I saw when looking at the logs was this error: WARN [main] 2025-10-31 21:18:50,483 SnapshotLoader.java:121 - Could not load snapshot from /opt/cassandra/data/data/system/compaction_history-b4dbb7b4dc493fb5b3bfce6e434832ca/snapshots/1761945517930-upgrade-4.1.6-4.1.10. java.lang.NoSuchFieldError: READ_DATE_TIMESTAMPS_AS_NANOSECONDS This error seems harmless as the cluster is up and running, but I don’t know if this is normal or not. Since I only upgraded to a newer patch version, I assumed I could upgrade directly without applying the versions in between. I didn’t find many articles online on how I should approach this as most articles are focused on major upgrades (like 3.0 -> 4.0). Should I try upgrading without skipping patch versions or is it fine as I just did on my staging cluster? One final side question: when you do patch upgrades, I presume there shouldn't be any need to run sstableupgrade, right? Many thanks, Alexandru Ionescu
