Minal Kyada created CASSANDRA-21503:
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Summary: System peers tables may be incorrectly repaired during a
rolling upgrade.
Key: CASSANDRA-21503
URL: https://issues.apache.org/jira/browse/CASSANDRA-21503
Project: Apache Cassandra
Issue Type: Bug
Components: Transactional Cluster Metadata
Reporter: Minal Kyada
Assignee: Minal Kyada
During a rolling upgrade from 4.0.4 to 4.0.5, the system peers tables are
expected to be temporarily divergent from ClusterMetadata. Nodes still on 4.0.4
have not yet registered with TCM, so their peer table entries are not fully
reflected in ClusterMetadata.directory.
SystemPeersValidator.validateAndRepair() does not account for this window,
making it possible for the peers tables to end up in an incorrect state where
valid peer entries have been removed or overwritten.
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