[jira] [Resolved] (RATIS-993) Support pre vote

["Tsz-wo Sze (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/RATIS-993?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz-wo Sze resolved RATIS-993.
------------------------------
    Fix Version/s: 1.1.0
       Resolution: Fixed

I have merged the pull request.  Thanks, [~yjxxtd]!

> Support pre vote
> ----------------
>
>                 Key: RATIS-993
>                 URL: https://issues.apache.org/jira/browse/RATIS-993
>             Project: Ratis
>          Issue Type: New Feature
>          Components: server
>            Reporter: runzhiwang
>            Assignee: runzhiwang
>            Priority: Major
>             Fix For: 1.1.0
>
>          Time Spent: 5h 20m
>  Remaining Estimate: 0h
>
> For example, leader is s1, and s2, s3 are the followers. If there is something wrong with s3's network, and s3 lose connection with leader in a short time interval,  s3 will trigger election. when s3's network recovery, leader will step down which is unnecessary. So I want to add pre vote before real vote.
> 1. if s3 want to request vote, it first send a pre vote request.
> 2. when s1 and s2 receive pre vote request of s3, they check their electionTimeout to decide whether should trigger leader election.
> 3. If s1 and s2 refuse to trigger a new leader election, s3 still keep as follower.



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