Marcus Eriksson updated CASSANDRA-15461:
    Reviewers: Marcus Eriksson

> 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
>            Priority: Normal
>             Fix For: 4.0-beta
> 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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