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https://issues.apache.org/jira/browse/CASSANDRA-21503?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Minal Kyada updated CASSANDRA-21503:
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Fix Version/s: 6.x
7.x
> 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
> Priority: Normal
> Fix For: 6.x, 7.x
>
>
> 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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