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https://issues.apache.org/jira/browse/RATIS-1930?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Song Ziyang resolved RATIS-1930.
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Fix Version/s: 3.0.0
Resolution: Fixed
The PR is now merged. Thanks [~szetszwo] for working on this!
> Add a conf for enable/disable majority-add.
> -------------------------------------------
>
> Key: RATIS-1930
> URL: https://issues.apache.org/jira/browse/RATIS-1930
> Project: Ratis
> Issue Type: Improvement
> Components: server
> Reporter: Tsz-wo Sze
> Assignee: Tsz-wo Sze
> Priority: Major
> Fix For: 3.0.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> RATIS-1912 added a restriction on setConf for enforcing a safety property,
> otherwise, the server group may end up in a no-leader state and cannot
> recover by themselves. The restriction is to disallow majority-add as defined
> below
> - {*}Majority-add{*}: adding a majority of server in a single setConf. Note
> that, when a single setConf removes and adds members at the same time, the
> majority is counted after the removal.
> This JIRA is to add a conf for enable/disable majority-add since, in some
> monitored environment, the safety property is not a problem. The monitor (a
> human or a program) could intervene to fix the problem, if it happens.
> Disabling the restriction can improve performance. For example, change from
> non-HA single server to a HA 3-server group can be done in a single setConf,
> instead of 2 setConfs with the restriction.
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