This sounds a lot like cassandra-13004 which was fixed, but broke data being read-repaired during an alter statement
I suspect it’s not actually that same bug, but may be close/related. Reproducing it reliably would be a huge help. - Jeff > On May 7, 2024, at 1:50 AM, Matthias Pfau via user > <user@cassandra.apache.org> wrote: > > Hi there, > we just ran drop compact storage in order to prepare for the upgrade to > version 4. > > We observed that column values have been written as null, if they where > inserted while the drop compact storage statement was running. This just > happened for the couple seconds the drop compact storage statement ran. > > Did anyone else observe this? What are the proposed strategies to prevent > data loss. > > Best, > Matthias
