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https://issues.apache.org/jira/browse/IGNITE-15271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17461246#comment-17461246
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Mirza Aliev commented on IGNITE-15271:
--------------------------------------
According to paragraph 6 of the original RAFT
[paper|https://raft.github.io/raft.pdf], these changes are valid and I approve
that PR
{noformat}
To prevent this problem, servers disregard RequestVote
RPCs when they believe a current leader exists. Specifically, if a server
receives a RequestVote RPC within
the minimum election timeout of hearing from a current leader, it does not
update its term or grant its vote.
This does not affect normal elections, where each server
waits at least a minimum election timeout before starting
an election. However, it helps avoid disruptions from removed servers: if a
leader is able to get heartbeats to its
cluster, t
{noformat}
> ITNodeTest.testFollowerStartStopFollowing is still flaky
> --------------------------------------------------------
>
> Key: IGNITE-15271
> URL: https://issues.apache.org/jira/browse/IGNITE-15271
> Project: Ignite
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha2
> Reporter: Alexey Scherbakov
> Assignee: Alexey Scherbakov
> Priority: Major
> Labels: ignite-3
>
> {noformat}
> org.opentest4j.AssertionFailedError
> org.opentest4j.AssertionFailedError: expected: <true> but was: <false>
> at
> org.apache.ignite.raft.jraft.core.ITNodeTest.testFollowerStartStopFollowing(ITNodeTest.java:2678)
> {noformat}
> The issue is caused by (unexpected) excessive number of state changes during
> leader election on term=2:
> {noformat}
> INFO: onStartFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004,
> term=2, status=Status[ENEWLEADER<10011>: Follower receives message from new
> leader with the same term.]].
> Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
> INFO: onStartFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004,
> term=2, status=Status[ENEWLEADER<10011>: Follower receives message from new
> leader with the same term.]].
> Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
> Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
> INFO: onStartFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004,
> term=2, status=Status[ENEWLEADER<10011>: Follower receives message from new
> leader with the same term.]].
> Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
> INFO: onStopFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004, term=2,
> status=Status[EVOTEFORCANDIDATE<10010>: Raft node votes for some candidate,
> step down to restart election_timer.]].
> Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
> Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
> WARNING: Node <unitest/172.17.0.6:5004> received invalid RequestVoteResponse
> from 172.17.0.6:5006, state not in STATE_CANDIDATE but STATE_LEADER.
> Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
> INFO: onStartFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004,
> term=2, status=Status[ENEWLEADER<10011>: Follower receives message from new
> leader with the same term.]].
> {noformat}
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