Denis Chudov created IGNITE-24772:
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Summary: Data loss in in-memory group after several node restarts
without losing majority in any moment of time
Key: IGNITE-24772
URL: https://issues.apache.org/jira/browse/IGNITE-24772
Project: Ignite
Issue Type: Bug
Reporter: Denis Chudov
Scenario:
Nodes: A,B,C.
A is a leader.
Client writes some data, data is replicated to A and B, committed on the leader
(A) and the write operation succeeds from client's POV.
A fails, then returns to the cluster. No data saved on A because it is
in-memory.
The cluster tries to include A as a clean node, it tries to exclude it from the
configuration and include again, but configuration is not applied for some time
because there is no leader and may be some temporary network issues preventing
the write of new data.
Then the user (that thinks that the majority would be preserved) restarts node
B. It also loses the data.
Let's say that data wasn't even replicated on C.
As a result, the data is lost.
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