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https://issues.apache.org/jira/browse/ZOOKEEPER-876?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Diogo updated ZOOKEEPER-876:
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Status: Patch Available (was: Open)
Depends on the patch ZOOKEEPER-874. (Applied in any order)
> Unnecessary snapshot transfers between new leader and followers
> ---------------------------------------------------------------
>
> Key: ZOOKEEPER-876
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-876
> Project: Zookeeper
> Issue Type: Bug
> Affects Versions: 3.3.1
> Reporter: Diogo
> Priority: Minor
> Attachments: ZOOKEEPER-876.patch
>
>
> When starting a new leadership, unnecessary snapshot transfers happen between
> new leader and followers. This is so because of multiple small bugs.
> 1) the comparison of zxids is done based on a new proposal, instead of the
> last logged zxid. (LearnerFollower.java:310)
> 2) if follower is one zxid behind, the check of the interval of committed
> logs excludes the follower. (LearnerFollower.java:269)
> 3) the bug reported in ZOOKEEPER-874 (commitLogs are empty after recover).
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