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From "Sam Tunnicliffe (Jira)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-15461) Legacy counter shards can cause false positives in repaired data tracking
Date Thu, 19 Dec 2019 13:08:00 GMT
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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