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https://issues.apache.org/jira/browse/HDDS-13112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang updated HDDS-13112:
-----------------------------------
Parent: HDDS-12940
Issue Type: Sub-task (was: Improvement)
> [Docs] OM Bootstrap can also happen when follower falls behind too much
> -----------------------------------------------------------------------
>
> Key: HDDS-13112
> URL: https://issues.apache.org/jira/browse/HDDS-13112
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: documentation, OM HA
> Affects Versions: 2.1.0
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Priority: Minor
> Labels: pull-request-available
> Fix For: 2.1.0
>
>
> [https://ozone.apache.org/docs/edge/feature/om-ha.html]
>
> It is written in the user doc that OM bootstrap happens when adding a new OM.
> Ratis would trigger notifyInstallSnapshotFromLeader() if a follower OM falls
> behind the leader OM. We should update the doc to include this condition too.
> [https://github.com/apache/ratis/blob/c1da37cb455bbf94da267b3f2b9bf3884017e1ca/ratis-server-api/src/main/java/org/apache/ratis/server/leader/LogAppender.java#L109]
> {code:java}
> /**
> * Should this {@link LogAppender} send a snapshot to the follower?
> *
> * @return the snapshot if it should install a snapshot; otherwise, return
> null.
> */
> default SnapshotInfo shouldInstallSnapshot() {
> // we should install snapshot if the follower needs to catch up and:
> // 1. there is no local log entry but there is snapshot
> // 2. or the follower's next index is smaller than the log start index
> // 3. or the follower is bootstrapping and has not installed any snapshot
> yet {code}
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