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https://issues.apache.org/jira/browse/RATIS-2008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17808315#comment-17808315
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Tsz-wo Sze commented on RATIS-2008:
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bq. ... the candidate has the same peer ID as the current leader.
Why the leader sends PRE_VOTE? Is this the case that the leader has stepped
down and then starts an election?
If the leader has stepped down, the follower will time out and then it will
accept the PRE_VOTE.
> Follower should recognize candidate if the candidate is the same peer as the
> current recognized leader
> ------------------------------------------------------------------------------------------------------
>
> Key: RATIS-2008
> URL: https://issues.apache.org/jira/browse/RATIS-2008
> Project: Ratis
> Issue Type: Improvement
> Reporter: Ivan Andika
> Assignee: Ivan Andika
> Priority: Minor
>
> During pre-vote, some follower reject the PRE_VOTE request from a candidate
> although the candidate has the same peer ID as the current leader.
> {code:java}
> 2024-01-18 13:44:50,123 [grpc-default-executor-100] INFO
> org.apache.ratis.server.impl.VoteContext:
> e46cc30b-13ca-4778-b856-e84b0677493d@group-059247EC8137-FOLLOWER: reject
> PRE_VOTE from c7e3fa47-df62-4883-8d6e-50c3b6a9b94c: this server is a follower
> and still has a valid leader c7e3fa47-df62-4883-8d6e-50c3b6a9b94c
> {code}
> It might be a good idea to addd another check so that if the candidate has
> the same peer ID as the follower's current recognized leader, we approve the
> PRE_VOTE request.
> Note: The optimization might be marginal since recognized leader will expire
> after min.rpc.timeout (150ms) anyway.
>
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