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https://issues.apache.org/jira/browse/IGNITE-22937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roman Puchkovskiy updated IGNITE-22937:
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Epic Link: IGNITE-22880 (was: IGNITE-22795)
> Close all physical connections after initializing a node
> --------------------------------------------------------
>
> Key: IGNITE-22937
> URL: https://issues.apache.org/jira/browse/IGNITE-22937
> Project: Ignite
> Issue Type: Improvement
> Reporter: Roman Puchkovskiy
> Priority: Major
> Labels: iep-128, ignite-3
>
> We have a mechanism that disallows to nodes to establish a connection if they
> have different clusterIds attached to them (see IGNITE-22804). This is needed
> to do CMG/MG disaster recovery as safely as possible.
> A non-initialized node does not have a clusterId attached to it, so it is
> allowed to establish a connection with any node. It might happen that such a
> node establishes a connection with 2 nodes which have different clusterIds
> (one of them might be from the old incarnation of the cluster, before CMG/MG
> repair, and another is from the new incarnation, after repair). After it gets
> initialized, it might get partition data from one of these nodes, and then it
> could transfer that data to another node. As a result, the nodes from
> different incarnations will (indirectly) communicate, which we should
> prohibit.
> To avoid this, we should close all physical connections at the moment a node
> gets initialized. It will try to reestablish the connections, but this time
> it will have a clusterId, so it will not be able to connect nodes from a
> different incarnation of the cluster.
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