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Posted to issues@ratis.apache.org by "Tsz Wo Nicholas Sze (JIRA)" <ji...@apache.org> on 2017/08/01 18:00:03 UTC

[jira] [Updated] (RATIS-97) Leader may not have majority after setConfiguration

     [ https://issues.apache.org/jira/browse/RATIS-97?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz Wo Nicholas Sze updated RATIS-97:
-------------------------------------
    Attachment: r97_20170801.patch

r97_20170801.patch: joins the StateMachineUpdater thread after interrupt.

> Leader may not have majority after setConfiguration
> ---------------------------------------------------
>
>                 Key: RATIS-97
>                 URL: https://issues.apache.org/jira/browse/RATIS-97
>             Project: Ratis
>          Issue Type: Bug
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>         Attachments: r97_20170728.patch, r97_20170731.patch, r97_20170801.patch
>
>
> Here is an example: Suppose a group has 3 servers and one of them is the leader.  Use setConfiguration to add 6 more servers.  The leader is still running as a leader although it does not has majority anymore.  The 6 new servers may elect a new leader among them.  Finally, there are two leaders in the group.



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