Data loss after repair

Author: Alex Tbk

Our repair jobs failed for a long period (> 14 days). Today i manually started an repair job with nodetool repair -pr. Afterwards it looks like we lost some data from a table.

Question: Is it theoretically possible to lose data after a repair job? If yes what can be done to avoid this?

Originally Sourced from: https://stackoverflow.com/questions/57893249/data-loss-after-repair