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add ForgetLeader #78

Merged
merged 3 commits into from
Jun 26, 2023
Merged

add ForgetLeader #78

merged 3 commits into from
Jun 26, 2023

Commits on Jun 23, 2023

  1. rafttest: add log-level argument for stabilize 

    Signed-off-by: Erik Grinaker <grinaker@cockroachlabs.com>
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    erikgrinaker committed Jun 23, 2023
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  2. rafttest: show term and leader for raft-state 

    Signed-off-by: Erik Grinaker <grinaker@cockroachlabs.com>
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    erikgrinaker committed Jun 23, 2023
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  3. add ForgetLeader 

    This patch adds `ForgetLeader()`, which causes a follower to forget its
current leader, changing it to None. It remains a leaderless follower in
the current term, without campaigning.

This is particularly useful with PreVote+CheckQuorum, if the caller has
strong reason to believe the leader is dead, since it will grant
prevotes but also revert to follower if it hears from the leader. A
quorum of such leaderless followers can thus allow a pre-candidate to
hold an election if they believe the leader to be dead.

Signed-off-by: Erik Grinaker <grinaker@cockroachlabs.com>
    @erikgrinaker
    erikgrinaker committed Jun 23, 2023
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    1159466 View commit details
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