Upgradesstables - PerSSTableIndexWriter.java:211 - Rejecting value

Hi, We are in process of upgrading from 3.11.0 to 3.115 . While upgrading SSTables we are noticing messages like below in system.log. What are the significance of these messages? INFO [CompactionExecutor:3] 2020-03-05 16:12:41,393 PerSSTableIndexWriter.java:211 - Rejecting value (size 1.022KiB,

Re: [EXTERNAL] Cassandra 3.11.X upgrades

There isn't any Rollback in real time systems. It's better to test upgrade sstables and binary on one node. Then - if it was OK, upgrade binary on all nodes then run upgrade sstables one server at a time. OR - If it was OK, upgrade servers (binary+sstables) one by one.