Sylvain Lebresne created CASSANDRA-14874:
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Summary: Read repair can race with truncations
Key: CASSANDRA-14874
URL: https://issues.apache.org/jira/browse/CASSANDRA-14874
Project: Cassandra
Issue Type: Bug
Components: Local Write-Read Paths
Reporter: Sylvain Lebresne
While hint and commit log replay handle truncation alright, we don't have
anything to prevent a read/read-repair to race with {{TRUNCATE}}. In other
words, you can have a read reading some pre-truncation data, some truncation
running and removing that data, and then some read-repair mutation from that
previous read that resurrects some data that should have bene truncated.
Probably not that common in practice, but can lead to seemingly random data
surviving truncate.
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