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https://issues.apache.org/jira/browse/IGNITE-22804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roman Puchkovskiy reassigned IGNITE-22804:
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Assignee: Roman Puchkovskiy
> Refuse network handshake if nodes have different cluster IDs
> ------------------------------------------------------------
>
> Key: IGNITE-22804
> URL: https://issues.apache.org/jira/browse/IGNITE-22804
> Project: Ignite
> Issue Type: Improvement
> Reporter: Roman Puchkovskiy
> Assignee: Roman Puchkovskiy
> Priority: Major
> Labels: ignite-3
>
> When a node is joined to a cluster for the first time, the node gets the
> cluster ID from the CMG. The node then saves the cluster ID locally.
> We should validate that cluster IDs of the nodes are the same when the nodes
> try to establish a network connection: that is, during a handshake, if both
> cluster IDs are not empty and are different, we should fail the handshake.
> If one of the nodes does not have a cluster ID yet, the validation is skipped.
> Having this validation will allow to avoid mixing of the 'new part' of the
> cluster (where CMG was recreated) with the 'old part' of the cluster (that
> was not available during CMG recreation).
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