Nanda kumar created RATIS-981:
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Summary: Step-down stale leader in case of split-brain
Key: RATIS-981
URL: https://issues.apache.org/jira/browse/RATIS-981
Project: Ratis
Issue Type: Improvement
Reporter: Nanda kumar
Assignee: Nanda kumar
We should make sure that the stale leader steps down to the candidate state
before the next leader election.
Proposal:
In the heartbeat thread in the Leader node, we should check if the last
response time of the follower is less than the leader election timeout. If the
majority of the follower’s last response time is less than the leader election
timeout, the current leader is still the active leader. Majority of the
followers are heartbeating to the current leader, so there can’t be a new
leader.
If the majority of follower’s last response time is greater than the leader
election timeout, the current leader should step down and become a candidate.
With this check, we can be sure that the current leader will step down and
become a candidate before the new leader election starts in case of a network
partition.
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