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https://issues.apache.org/jira/browse/RATIS-352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo Nicholas Sze updated RATIS-352:
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Attachment: r352_20181115.patch
> Persist commit index in Raft log.
> ---------------------------------
>
> Key: RATIS-352
> URL: https://issues.apache.org/jira/browse/RATIS-352
> Project: Ratis
> Issue Type: Improvement
> Components: server
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Tsz Wo Nicholas Sze
> Priority: Major
> Attachments: r352_20181106.patch, r352_20181107.patch,
> r352_20181115.patch
>
>
> Current the commit index is not persisted in the Raft log. When a server
> restarts, it cannot apply its log until it has joined a Raft group. There is
> no problem if there is a Raft group.
> However, a server cannot recover its data when formatting a Raft group is
> impossible (e.g. a majority of servers are dead). Ideally, a server can
> safely apply the log up to the commit index. The JIRA is to persist the
> commit index so that such recovery is possible.
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