Vladimir Steshin created IGNITE-27746:
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Summary: MDC. Implement parallel ping of DC2's nodes with the
connection recovery.
Key: IGNITE-27746
URL: https://issues.apache.org/jira/browse/IGNITE-27746
Project: Ignite
Issue Type: Improvement
Reporter: Vladimir Steshin
Consider:
* The Multy-DC feature is on.
* A corner node from DC1 can't send a message to it's next node in DC2.
* DC2 is unavailable.
* No node of DC1 can connect.
To prevent sequential nodes failure in DC1 we need to extend the connection
recovery mechanics. We need to know whether DC2 is completely unavailable. If
so, we switch to DC/brain split but keep nodes of DC1 online. To achive this we
might ping DC2's nodes from the edge node while it does the normal connection
recovery under the same connection recovery timeout. If the recovery fails and
no ping to DC2 is success, we consider DC1 to work separatelly from DC2.
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