Hi, I would like to bring this issue to your attention.
Link to the ticket: https://issues.apache.org/jira/browse/CASSANDRA-14336 <https://issues.apache.org/jira/browse/CASSANDRA-14336> Basically if a table contains dropped columns and you try to restore a snapshot to a new cluster, that will fail because of an error like "java.lang.RuntimeException: Unknown column XXX during deserialization”. I feel this is quite serious problem for backup and restore functionality of Cassandra. You cannot restore a backup to a new cluster if columns have been dropped. There have been other similar tickets that have been apparently closed but based on my test with 3.11.4, the issue still persists. Best Regards, Hannu Kröger
