Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Ignore prevote if leader lease is still valid. #366

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Ignore prevote if leader lease is still valid. #366

wants to merge 1 commit into from

Commits on Jun 28, 2022

  1. Ignore prevote if leader lease is still valid. 

    Suppose a raft group ng0 consists of three nodes(A(localhost:8001),
B(localhost:8011), C(localhost:8021)), timeline is as follows: T1: A is elected
as the leader of group ng0. term 2.  T2: Restart B.  T3: B start prevote for
ng0, with log message node ng0:127.0.0.1:8011 term 2 start pre_vote T4: B got
prevote grant ack from A with log message node ng0:127.0.0.1:8011:1 received
PreVoteResponse from 127.0.0.1:8001:0 term 2 granted 1 rejected_by_lease 0
disrupted 1 T5: B start to vote.  T6: B got vote grant ack from A. node
ng0:127.0.0.1:8011:1 received RequestVoteResponse from 127.0.0.1:8001:0 term 3
granted 1 rejected_by_lease 0 disrupted 1 T7: B got vote reject from C. node
ng0:127.0.0.1:8011:1 received RequestVoteResponse from 127.0.0.1:8021:0 term 2
granted 0 rejected_by_lease 1 disrupted 0 T8: B become the leader of ng0 with
term 3.

It's a bug that old leader A will accept the prevote and vote from reboot node B
    @zhangh43
    zhangh43 committed Jun 28, 2022
    Configuration menu
    Copy the full SHA
    ce0706b View commit details
    Browse the repository at this point in the history