[jira] [Created] (CASSANDRA-15461) Legacy counter shards can cause false positives in repaired data tracking

["Sam Tunnicliffe (Jira)" <ji...@apache.org>]

Sam Tunnicliffe created CASSANDRA-15461:
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             Summary: Legacy counter shards can cause false positives in repaired data tracking
                 Key: CASSANDRA-15461
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15461
             Project: Cassandra
          Issue Type: Bug
          Components: Observability/Metrics
            Reporter: Sam Tunnicliffe
            Assignee: Sam Tunnicliffe


It is expected that the serialization of legacy (pre-2.1) counter cells may differ across replicas due to the remote vs local designation of the shards. This will cause the repaired data digests calculated at read time to differ where certain legacy shards are encountered. This does not, however, indicate corruption of the repaired dataset and there isn't any action that operators can take in this scenario. Excluding counter cells which contain legacy shards from the digest calculation will avoid false positives.




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